1001 Smart Cities
🇹🇷 Istanbul

İETT Real-Time Bus Tracking & Open Transit Data

🤖 AI-generated summary · ◆ 9 sourced claims · 🔎 Last verified

This overview was generated with AI from the public sources listed below and checked against them before publication. It has not had a complete human fact-check — treat it as a starting point and follow the sources.

9 sourced claims on this page, none individually verified yet — turn on “Sources in the text” to see each one.

How this atlas is made · What “last verified” means · What “source-checked” means · The full record behind this page

The bus operator retired its own app: Mobiett was replaced on 31 August 2023 by 'Where Is My Bus'. The same bus data is published as GTFS and web services on the city portal, so rival apps can run on it too.

Outcome🔄 Ongoing
Evidence🏛️ Official
what does this mean?The strongest source is the operator's or the city's own reporting — an official report, dataset or press release. It grades who did the looking — not how well the project went. All four grades →
Run byİETT
Scale🏙️ City-wide

Part of 1001 Smart Cities — 1,216 documented projects · 🏙️ 9 more in Istanbul · 🚌 Public transport guide · 🚲 Mobility projects

Istanbul's public bus operator İETT tracks the positions of its buses and surfaces live vehicle locations, stop-level arrival predictions and route information through its official app — originally 'Mobiett', replaced on 31 August 2023 by 'Otobüsüm Nerede' ('Where Is My Bus'). İETT also publishes GTFS schedules and web services, including fleet vehicle positions, on İBB's open data portal under a licence that allows commercial reuse with attribution, so third-party apps can run on the same data.

Live

📊 Impact

İETT publishes no usage, accuracy or ridership figures for the app. Its own store listings show more than one million Android downloads and average ratings of 2.4 out of 5 on Google Play and 1.3 out of 5 on the App Store, with reviews comparing it unfavourably with Mobiett, the app it replaced.

🎓 Lesson

Replacing a passenger app is a risk of its own: the data underneath stayed the same, but the new app launched to reviews that preferred the one it retired. Publishing the same data openly is what keeps riders from depending on a single official app.

🚲 MobilityPublic transportOpen dataSensors & IoT

Sources

↗ İETT — 'Mobiett yerini Otobüsüm Nerede'ye bırakıyor' (operator announcement, 29 August 2023)Official İETT announcement of 29 August 2023: from 31 August the Otobüsüm Nerede app takes the place of Mobiett and carries all of Mobiett's functions and more.
↗ Otobüsüm Nerede — official İETT app (App Store)Store listing of İETT's official app: routes, timetables, stops and live bus tracking on a route map; version 1.0 dated 26 January 2023. Displays an average of 1.3 out of 5 from about 7,000 ratings, with reviews comparing it unfavourably with Mobiett.
↗ İBB Open Data Portal — İETT GTFS dataPublished 23 February 2022 · updated 21 April 2026İETT's GTFS dataset (agency, calendar, routes, stops, stop_times, trips) on İBB's open data portal, created 23 February 2022 and last updated 21 April 2026, under the İBB Open Data Licence. Real-time data sits in separate web-service datasets.
↗ İBB Open Data Portal — İETT journey web service (Sefer Gerçekleşme), with fleet vehicle positionsPublished 13 January 2020İBB open data portal entry for İETT's journey web service, published 13 January 2020: 'Instant journey realization rates of IETT are shared with this web service.' Its service definition also offers a fleet vehicle-position query (GetFiloAracKonum_json) and a per-line vehicle-position query.
↗ Otobüsüm Nerede — official İETT app (Google Play)Google Play listing of İETT's official app. The stop page shows which lines serve a stop and in how many minutes each bus will arrive; the listing shows more than a million downloads and an average of 2.4 out of 5.
Show 1 more sourcesShow fewer
↗ İBB Open Data Portal — Istanbul Metropolitan Municipality Open Data LicenceText of the İBB Open Data Licence: a worldwide, royalty-free, perpetual, non-exclusive licence to copy, publish, adapt and use the information commercially and non-commercially, on condition of attribution; without a provider-specified statement, users credit the data as licensed under CC BY 4.0.

📅 How old is the evidence?

Two clocks, kept apart: when this entry’s sources were published, and what has happened to its record in the atlas. 3 of 6 sources carry a publication date, from 13 January 2020 to 29 August 2023.

When the sources were published

  1. Istanbul Metropolitan Municipality (İBB) · city governmentİBB Open Data Portal — İETT journey web service (Sefer Gerçekleşme), with fleet vehicle positions
  2. İstanbul Büyükşehir Belediyesi (İBB) · city governmentİBB Open Data Portal — İETT GTFS data · updated 21 April 2026
  3. İETT (İstanbul Elektrik Tramvay ve Tünel İşletmeleri) · operatorİETT — 'Mobiett yerini Otobüsüm Nerede'ye bırakıyor' (operator announcement, 29 August 2023)

Every source, with links ↑

What happened to this record

  1. Entered the record
  2. Sources last read

Every revision, permanent →

Show your work What this page rests on and what it can’t tell you · all 9 claims with their sources · the forensic record

Evidence file · public beta 9 addressable claims, 6 source dossiers, one permanent baseline. The file is unreviewed — an AI-assisted structural migration, not a human or expert endorsement. Every revision keeps a permanent copy under revision history.

Inspect the claims, one by one — verbatim text, sources and caveats for all 9

The text below is copied verbatim from the published record. Each claim names the source dossiers that carry it; caveats stay attached to the claim they qualify.

Claim 1 clm-32d6a6c0a3ba3bc9 descriptive
Istanbul's public bus operator İETT tracks the positions of its buses and surfaces live vehicle locations, stop-level arrival predictions and route information through its official app
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this file
What the mapping says
The open web service İETT publishes exposes a fleet vehicle-position operation (GetFiloAracKonum_json); the Google Play description says the stop page shows which bus will reach the stop in how many minutes; the App Store release notes describe live tracking and bus icons on the route map.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. İBB Open Data Portal — İETT journey web service (Sefer Gerçekleşme), with fleet vehicle positions
  2. Otobüsüm Nerede — official İETT app (Google Play)
  3. Otobüsüm Nerede — official İETT app (App Store)
Claim 2 clm-65425cb83ba6d085 quantitative
originally 'Mobiett', replaced on 31 August 2023 by 'Otobüsüm Nerede' ('Where Is My Bus')
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this file
What the mapping says
İETT's announcement, dated 29 August 2023, says Otobüsüm Nerede takes Mobiett's place from 31 August.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. İETT — 'Mobiett yerini Otobüsüm Nerede'ye bırakıyor' (operator announcement, 29 August 2023)
Claim 3 clm-cb5915741dc06bfa descriptive
İETT also publishes GTFS schedules and web services, including fleet vehicle positions, on İBB's open data portal
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this file
What the mapping says
The portal lists an İETT GTFS dataset (created 23 February 2022, last updated 21 April 2026) and İETT web services; the journey service describes itself as sharing 'instant journey realization rates' and its service definition includes a fleet vehicle-position operation.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. İBB Open Data Portal — İETT GTFS data
  2. İBB Open Data Portal — İETT journey web service (Sefer Gerçekleşme), with fleet vehicle positions
Claim 4 clm-6b447ba75496b0b2 descriptive
under a licence that allows commercial reuse with attribution, so third-party apps can run on the same data
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this file
What the mapping says
The İBB Open Data Licence grants a worldwide, royalty-free licence to copy, adapt and use the information commercially and non-commercially, on condition of attribution; the GTFS dataset is published under it.
Caveat
The licence is İBB's own text, modelled on open-government licences; where the data provider names no attribution statement, it asks users to credit the data as licensed under CC BY 4.0.

Sources carrying this claim

  1. İBB Open Data Portal — Istanbul Metropolitan Municipality Open Data Licence
  2. İBB Open Data Portal — İETT GTFS data
Claim 5 clm-ea3a37a2f5ed841c descriptive
İETT publishes no usage, accuracy or ridership figures for the app
Published field
impact · verbatim
Mapping
mapped · no interpretation or interpolation added by this file
What the mapping says
Neither the operator's announcement nor its store listings state download, usage or prediction-accuracy figures; the only numbers on record are the store platforms' own counters.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. İETT — 'Mobiett yerini Otobüsüm Nerede'ye bırakıyor' (operator announcement, 29 August 2023)
  2. Otobüsüm Nerede — official İETT app (Google Play)
  3. Otobüsüm Nerede — official İETT app (App Store)
Claim 6 clm-9675a9359d805438 quantitative
Its own store listings show more than one million Android downloads and average ratings of 2.4 out of 5 on Google Play and 1.3 out of 5 on the App Store
Published field
impact · verbatim
Mapping
mapped · no interpretation or interpolation added by this file
What the mapping says
Google Play shows '1 Mn+ İndirme' and a 2.4-star average from about 13,900 reviews; the App Store shows '1.3 out of 5' from about 7,000 ratings.
Caveat
Store counters change continuously; these are the figures displayed in September 2026, and ratings measure satisfaction, not accuracy.

Sources carrying this claim

  1. Otobüsüm Nerede — official İETT app (Google Play)
  2. Otobüsüm Nerede — official İETT app (App Store)
Claim 7 clm-fac9834b8e7b84e5 descriptive
with reviews comparing it unfavourably with Mobiett, the app it replaced
Published field
impact · verbatim
Mapping
mapped · no interpretation or interpolation added by this file
What the mapping says
App Store reviews from 2023 complain that Mobiett gave bus times 'to the minute' and that the replacement is unreliable.
Caveat
Store reviews are a self-selected sample of users.

Sources carrying this claim

  1. Otobüsüm Nerede — official İETT app (App Store)
Claim 8 clm-5e94c9633be05df9 descriptive
the data underneath stayed the same, but the new app launched to reviews that preferred the one it retired
Published field
lesson · verbatim
Mapping
mapped · no interpretation or interpolation added by this file
What the mapping says
The operator presented the new app as carrying all of Mobiett's functions; early reviews still preferred Mobiett.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. İETT — 'Mobiett yerini Otobüsüm Nerede'ye bırakıyor' (operator announcement, 29 August 2023)
  2. Otobüsüm Nerede — official İETT app (App Store)
Claim 9 clm-b4afa8c0a97a4de5 descriptive
Publishing the same data openly is what keeps riders from depending on a single official app
Published field
lesson · verbatim
Mapping
mapped · no interpretation or interpolation added by this file
What the mapping says
The GTFS dataset and web services are published under a licence permitting reuse in third-party products, so riders are not tied to the operator's own app.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. İBB Open Data Portal — İETT GTFS data
  2. İBB Open Data Portal — Istanbul Metropolitan Municipality Open Data Licence
Forensic record — source dossiers, gaps, hashes and the exact revision this page renders

This layer records what is known about each source, what is still missing, and the exact snapshot this page is rendering. A missing date, archive or hash stays visible as missing.

unreviewed Revision 2026-09-27-baseline-popular effective 2026-09-27 · created 2026-09-27

Awaiting operator and domain-expert review; publication of this revision implies neither.

sha256:8f369b2f4235eea90c63aa3375eb9aba180949f95048e60159f7e83fde500907
Revision history → Permanent version link → Machine-readable record → Evidence Constitution →
9
of 9 claims mapped
6
source dossiers
3
publication dates recorded
0
archives linked
0
exact locators
0
content captures hashed

Governance facts carried by the record

Operator
İETT
Actor types
utility
Funding model
public
Funding description
Not recorded
Cost
Not recorded
Ownership
Not recorded
Decision rights
Not recorded
Exit conditions
Not recorded

6 source dossiers

İETT — 'Mobiett yerini Otobüsüm Nerede'ye bırakıyor' (operator announcement, 29 August 2023) iett.istanbul · 3 linked claims

Open original source ↗

Stable source ID
src-f93c4be755468dc5
Publisher
Name not classified · iett.istanbul
Type / language
web-page · language not classified
Published
2023-08-29
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-09-27
Dossier created
2026-09-27
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Official İETT announcement of 29 August 2023: from 31 August the Otobüsüm Nerede app takes the place of Mobiett and carries all of Mobiett's functions and more.

Descriptive only — not page/paragraph exact
Claims linked
Otobüsüm Nerede — official İETT app (App Store) apps.apple.com · 5 linked claims

Open original source ↗

Stable source ID
src-bfb6ce5ea4c37580
Publisher
Name not classified · apps.apple.com
Type / language
web-page · language not classified
Published
Not recorded
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-09-27
Dossier created
2026-09-27
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Store listing of İETT's official app: routes, timetables, stops and live bus tracking on a route map; version 1.0 dated 26 January 2023. Displays an average of 1.3 out of 5 from about 7,000 ratings, with reviews comparing it unfavourably with Mobiett.

Descriptive only — not page/paragraph exact
Claims linked
İBB Open Data Portal — İETT GTFS data data.ibb.gov.tr · 3 linked claims

Open original source ↗

Stable source ID
src-fa9a7eaebf1852cb
Publisher
Name not classified · data.ibb.gov.tr
Type / language
web-page · language not classified
Published
2022-02-23
Updated
2026-04-21
Source last checked
No source-level check date
Record last verified
2026-09-27
Dossier created
2026-09-27
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

İETT's GTFS dataset (agency, calendar, routes, stops, stop_times, trips) on İBB's open data portal, created 23 February 2022 and last updated 21 April 2026, under the İBB Open Data Licence. Real-time data sits in separate web-service datasets.

Descriptive only — not page/paragraph exact
Claims linked
İBB Open Data Portal — İETT journey web service (Sefer Gerçekleşme), with fleet vehicle positions data.ibb.gov.tr · 2 linked claims

Open original source ↗

Stable source ID
src-e4990101510c1718
Publisher
Name not classified · data.ibb.gov.tr
Type / language
web-page · language not classified
Published
2020-01-13
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-09-27
Dossier created
2026-09-27
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

İBB open data portal entry for İETT's journey web service, published 13 January 2020: 'Instant journey realization rates of IETT are shared with this web service.' Its service definition also offers a fleet vehicle-position query (GetFiloAracKonum_json) and a per-line vehicle-position query.

Descriptive only — not page/paragraph exact
Claims linked
Otobüsüm Nerede — official İETT app (Google Play) play.google.com · 3 linked claims

Open original source ↗

Stable source ID
src-7903c5752e6374b9
Publisher
Name not classified · play.google.com
Type / language
web-page · language not classified
Published
Not recorded
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-09-27
Dossier created
2026-09-27
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Google Play listing of İETT's official app. The stop page shows which lines serve a stop and in how many minutes each bus will arrive; the listing shows more than a million downloads and an average of 2.4 out of 5.

Descriptive only — not page/paragraph exact
Claims linked
İBB Open Data Portal — Istanbul Metropolitan Municipality Open Data Licence data.ibb.gov.tr · 2 linked claims

Open original source ↗

Stable source ID
src-4606017555d583ca
Publisher
Name not classified · data.ibb.gov.tr
Type / language
web-page · language not classified
Published
Not recorded
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-09-27
Dossier created
2026-09-27
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Text of the İBB Open Data Licence: a worldwide, royalty-free, perpetual, non-exclusive licence to copy, publish, adapt and use the information commercially and non-commercially, on condition of attribution; without a provider-specified statement, users credit the data as licensed under CC BY 4.0.

Descriptive only — not page/paragraph exact
Claims linked
Known limits of this file
  • Publisher names and source languages have not yet been classified; domains are recorded without guessing.
  • Existing source notes are descriptive locators, not page- or paragraph-exact citations.
  • A missing archive, publication date or content hash is shown as null rather than inferred.
  • The project-level evidence grade ranks the strongest source in the entry; it is not a truth score for every claim.

Continue exploring

Compare this project

🇬🇧 TfL Open Data & Unified API · London London's TfL opened 80+ transit feeds in 2010; İETT publishes open GTFS and real-time bus data that third-party apps reuse. 🇫🇮 HSL Open Transit Data & the Digitransit Platform · Helsinki Open transit data: Helsinki's HSL opened its API in 2010; İETT publishes GTFS and live vehicle feeds for Istanbul's bus network. 🇮🇹 Muoversi a Roma: Real-Time Transit Data & Open GTFS Feeds · Rome Both publish open GTFS + real-time feeds into apps like Moovit: Rome's mobility agency since 2014, İETT for Istanbul's buses.

Explore the wider context

🔑 Your Smart City Is Owned by Someone Else📖 GTFS (General Transit Feed Specification)📖 Open data📖 Urban data platform (UDP)
📎 Cite this project

1001 Smart Cities (2026). “İETT Real-Time Bus Tracking & Open Transit Data” — Istanbul, Turkey. The Smart City Atlas. https://1001smartcities.org/projects/istanbul-iett-realtime-bus/ (last verified 2026-09-27). Data: CC BY 4.0.

The underlying data is free to reuse with attribution — see the open data page.

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