# London Underground Map Guide vs CTA Transit Tracker

London Underground Map Guide and CTA Transit Tracker are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Both ship on a similar rhythm, roughly every 3 months. The most recent releases landed on October 7, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | London Underground Map Guide | CTA Transit Tracker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.6 (182 ratings)](https://appshunter.io/ios/app/cta-transit-tracker/id6477437106/reviews)** |
| Number of ratings | — | **182** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Every 3 months | Every 3 months |
| Monetization | — | Free with in-app purchases |
| Size | 75 MB | 23 MB |
| Requires iOS | 14.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Grematech Communication](https://appshunter.io/developer/727046960) | [婧嘉 郭](https://appshunter.io/developer/1622970998) |

## What reviewers say

### London Underground Map Guide

[App page](https://appshunter.io/ios/app/london-underground-map-guide/id904308147)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### CTA Transit Tracker

[App page](https://appshunter.io/ios/app/cta-transit-tracker/id6477437106)

Track Chicago Transit Authority (CTA) buses in real-time. Get accurate arrival predictions for your chosen routes and stops. Save your favorite locations for quick access to upcoming bus times.

**Highlights:** Real-time CTA bus tracking, Accurate arrival predictions, Save favorite stops, User-friendly interface, Fast information retrieval

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is London Underground Map Guide free?

London Underground Map Guide is free to download, with no in-app purchases.

### Is CTA Transit Tracker free?

CTA Transit Tracker is free to download, with no in-app purchases.

### Do London Underground Map Guide or CTA Transit Tracker have ads?

Both London Underground Map Guide and CTA Transit Tracker show ads.

### Which is updated more often, London Underground Map Guide or CTA Transit Tracker?

London Underground Map Guide ships an update every 3 months, and CTA Transit Tracker every 3 months. Most recently, London Underground Map Guide was updated on October 7, 2026 and CTA Transit Tracker on October 17, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*