# ChiMarathon vs AO

The clearest difference is rating: AO at 5.0 against ChiMarathon's 2.5. AO also leads on update cadence (weekly vs every 2 weeks) and iOS requirement (16.0 vs 18.6). ChiMarathon's advantage is ratings volume (45 vs 3). On price, ads, in-app purchases and monetization model there is nothing between them.

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

AO holds the better App Store score, 5.0 against 2.5. That said, the two scores are not equally well evidenced: ChiMarathon has 45 ratings behind it against 3, so its average is the more settled of the two.

ChiMarathon ships an update every 2 weeks, AO weekly. The most recent releases landed on October 20, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | ChiMarathon | AO |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.5 (45 ratings)](https://appshunter.io/ios/app/chimarathon/id718145625/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/aocoach-trail-fit-trainer/id6783111739/reviews)** |
| Number of ratings | **45** | 3 |
| Positive reviews | 32.9% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Weekly** |
| Monetization | Free | Free |
| Size | 112 MB | 13 MB |
| Requires iOS | 18.6 | **16.0** |
| Devices | iPhone | **iPhone, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Tata Consultancy Services](https://appshunter.io/developer/467615204) | [Algorithm Overland LLC](https://appshunter.io/developer/1896524256) |

## What reviewers say

### ChiMarathon

[App page](https://appshunter.io/ios/app/chimarathon/id718145625)

Prepare for the Bank of America Chicago Marathon with this comprehensive resource. Track runners live, view athlete profiles, and access real-time weather and course maps. Spectators can send digital cheers to be displayed on the course.

**Highlights:** Live runner tracking, Athlete profiles, Live broadcast streaming, Real-time weather, Interactive course map, Digital cheer submission

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 👍 Great for tracking runners
- 👍 Works well in the UK
- 👍 Able to track runner entire time
- 👍 Loved tracking friends
- 👍 Very useful for watching friend run

**What reviewers complain about**

- 🐛 Map tracker not spectator-geared
- 🐛 Mile markers inconsistent
- 🐛 Map shows water stations for runners
- 🐛 Units displayed incorrectly (miles vs km)
- 🐛 App doesn't update times

**Reported bugs**

- Mile markers inconsistent
- Map shows water stations for runners
- Units displayed incorrectly (miles vs km)
- App doesn't update times
- Links in map don't work

**Requested features**

- Geared towards spectators for map tracking
- Display mile markers clearly
- Option to switch between miles and kilometers
- Update app design to be more modern
- Real-time updates and alerts for runners


### AO

[App page](https://appshunter.io/ios/app/aocoach-trail-fit-trainer/id6783111739)

This app provides structured cardio conditioning and interval running programs for outdoor athletes. It focuses on active progression with precise interval structures and heart rate zone tracking to optimize cardiovascular performance. Features include voice coaching and detailed historical tracking.

**Highlights:** Structured interval running programs, Cardio conditioning tracking, Voice coaching and timers, Heart rate zone target guidance, Progression-focused athletic training, Outdoor-engineered for athletes

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is ChiMarathon free?

ChiMarathon is free to download, with no in-app purchases.

### Is AO free?

AO is free to download, with no in-app purchases.

### Which has better reviews, ChiMarathon or AO?

AO is rated higher. ChiMarathon averages 2.5 out of 5 from 45 ratings, while AO averages 5.0 from 3 ratings.

### Do ChiMarathon or AO have ads?

Neither ChiMarathon nor AO shows ads.

### Which is updated more often, ChiMarathon or AO?

ChiMarathon ships an update every 2 weeks, and AO weekly. Most recently, ChiMarathon was updated on October 20, 2026 and AO on October 22, 2026.

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