# Gate CODES

> London Underground gate code reference for passenger display codes. (iPhone/iPad app by Ivan Perre.)

- Source: https://appshunter.io/ios/app/gate-codes/id533125865 (this page in markdown: same URL + `.md`)
- Developer: [Ivan Perre](https://appshunter.io/developer/514399565)
- Category: Reference
- Price: Free
- Age rating: 4+
- Requires: iOS 17.0 · 5 MB
- Languages: American English
- Released: 2012-06-11
- Data updated: 2026-08-26
- Monetization: ad-supported
- User reviews in markdown: https://appshunter.io/ios/app/gate-codes/id533125865/reviews.md

## What is Gate CODES?

Gate CODES is a handy reference app for the Passenger Orientated Display CODES used by London Underground.

Whether its a 36, 94, or 21, find out exactly why the gate won't open.

It's a useful free tool for staff and customers alike.

## Key features

- London Underground gate code lookup
- Passenger Orientated Display CODES
- Troubleshoot gate opening issues
- Reference for staff and customers
- Free utility

## Recent user reviews (9 of 9)

All indexed reviews: https://appshunter.io/ios/app/gate-codes/id533125865/reviews.md

### 4/5 — Perfect IF…

*2025-07-10*

Great app. would be perfect if there was a small description of what to do if these codes are shown.

### 4/5 — Great

*2024-01-03*

Would be good to have the pod codes for things over 100 e.g for barcode and ITSO.

### 5/5 — Good app for staff

*2020-07-30*

Noice

### 3/5 — Quite handy for not getting into trouble

*2014-02-25*

It's good to tell the slow staff what is up or just bypass them and deal with it yourself but especially good if you ever need to speak to someone over the phone about it

### 5/5 — Brilliant app!

*2013-05-28*

This will make my days in the gate line so much easier! Thanks Ivan :)

### 5/5 — Gate codes

*2012-10-27*

Well done great and most useful app. Every CSA will love this. 
Great idea!

### 4/5 — Nice little tool

*2012-08-17*

I hate not knowing why the gate doesn't open... Now I know what they know!!

### 5/5 — At last!

*2012-08-14*

Now I know what 94 means!!

### 4/5 — 36!!!

*2012-06-13*

I need to top up my Oyster :(

## Frequently asked questions about Gate CODES

### What are Gate CODES used for?

Gate CODES are used on the London Underground to display information about why a gate may not be opening. This app helps you understand what these codes mean.

### Is Gate CODES free to use?

Yes, Gate CODES is a free reference app for understanding London Underground gate codes.

### Does Gate CODES have ads?

Yes, Gate CODES contains advertisements to support its development and maintenance.

### What devices support Gate CODES?

Gate CODES is available for iPhone and iPad devices.

### How often is Gate CODES updated?

The app was last updated on December 21, 2023, with version 2.1. Updates typically occur to maintain compatibility and accuracy.

### What is the age rating for Gate CODES?

Gate CODES has an age rating of 4+, making it suitable for a wide audience.

### Who developed Gate CODES?

Gate CODES was developed by Ivan Perre.

### Can I use Gate CODES offline?

The description does not specify offline functionality. As a reference app, it likely requires an internet connection to access the most up-to-date code information.

## Version history (last 5 releases)

### 2.1 — 2023-12-21

Updated the gate codes
Improved UI for iPad and iPhone
Included Advertisments to help support further app development

### 2.0 — 2015-07-09

This app has been updated by Apple to display the Apple Watch app icon.

Included the new gate codes for Contactless payment and introduced a new simplified layout

### 1.5 — 2013-11-25

Updated CODES
UI Improvements

### 1.4 — 2013-01-17

Added new CODES!
iOS 5.0 compatible

### 1.3 — 2012-11-30

-Now supports iPhone 5 and iPad.
-Minor UI improvements

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## More apps by Ivan Perre

- [iGradient](https://appshunter.io/ios/app/igradient/id514399562)
- [Before and After](https://appshunter.io/ios/app/before-and-after/id659965462)
- [Site Report](https://appshunter.io/ios/app/site-report/id880697730)
- [Shift Report](https://appshunter.io/ios/app/shift-report/id1078070267)
- [Site Report 2](https://appshunter.io/ios/app/site-report-2/id1277218877)

All apps by Ivan Perre: https://appshunter.io/developer/514399565

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-26.*