# Half Marathon 13.1 Trainer vs FlexChallenge

The clearest difference is ads: FlexChallenge at none against Half Marathon 13.1 Trainer's shown. FlexChallenge also leads on update cadence (every 6 days vs every 6 weeks). Half Marathon 13.1 Trainer's advantage is device support (4 vs 1) and iOS requirement (14.0 vs 17.6). On price and in-app purchases there is nothing between them.

Both are free to download. Half Marathon 13.1 Trainer sells 5 in-app purchases, starting at $4.99 per month and FlexChallenge sells 2 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

Half Marathon 13.1 Trainer ships an update every 6 weeks, FlexChallenge every 6 days. The most recent releases landed on November 3, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Half Marathon 13.1 Trainer | FlexChallenge |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (5.6K ratings)](https://appshunter.io/ios/app/half-marathon-131-trainer/id514647091/reviews)** | — |
| Number of ratings | **5.6K** | — |
| Positive reviews | 55.7% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 6 weeks | **Every 6 days** |
| Monetization | Free with in-app purchases | — |
| Size | 319 MB | 17 MB |
| Requires iOS | **14.0** | 17.6 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Zen Labs](https://appshunter.io/developer/485971738) | [Local Wave Studios LLC](https://appshunter.io/developer/1866312694) |

## What reviewers say

### Half Marathon 13.1 Trainer

[App page](https://appshunter.io/ios/app/half-marathon-131-trainer/id514647091)

This app guides beginners through a 14-week program to train for a half marathon using a run-walk method. It offers audio coaching, progress tracking, and community support to help users complete their first 13.1-mile race.

**Highlights:** 14-week run-walk training program, Audio coach and alerts, Run mapping, Health app integration, Community forums, Music integration

**Features:** Family Sharing, Apple Watch app, Vision Pro support

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Zen Unlimited Pass Monthly | $4.99 | per month |
| Unlock Your Potential | $29.99 | per 3 months |
| Unlock Your Potential | $29.99 | per 3 months |
| Zen Unlimited Pass Annual | $74.99 | per year |
| Unlock Workout List | $0.99 | one-time |

**What reviewers like**

- 👍 Easy to use
- 👍 Helpful for beginners
- 👍 Great for training and motivation
- 👍 Integrates well with Apple Watch and Fitness
- 👍 Customizable music playback

**What reviewers complain about**

- 🐛 Occasional syncing and tracking issues
- 🔋 Drains battery life
- 💰 Subscription model change frustrates some users
- 💰 Paid app now requires subscription for full access

**Reported bugs**

- App crashes or freezes during workouts
- Inconsistent distance and time tracking
- Syncing issues with Apple Watch

**Requested features**

- Option to view GPS route history
- Ability to customize training days and schedule
- Integration with more fitness tracking devices
- Detailed performance metrics and analytics


### FlexChallenge

[App page](https://appshunter.io/ios/app/flexchallenge/id6757351926)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| FlexChallenge Pro Monthly | $3.99 | per month |
| FlexChallenge Pro Yearly | $24.99 | per year |


## Frequently asked questions

### Is Half Marathon 13.1 Trainer free?

Half Marathon 13.1 Trainer is free to download, with in-app purchases available.

### Is FlexChallenge free?

FlexChallenge is free to download, with in-app purchases available.

### Do Half Marathon 13.1 Trainer or FlexChallenge have ads?

Half Marathon 13.1 Trainer shows ads; FlexChallenge does not.

### Which is updated more often, Half Marathon 13.1 Trainer or FlexChallenge?

Half Marathon 13.1 Trainer ships an update every 6 weeks, and FlexChallenge every 6 days. Most recently, Half Marathon 13.1 Trainer was updated on November 3, 2026 and FlexChallenge on October 28, 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.*