# 10K Trainer by C25K® vs Fastime

The clearest difference is in-app purchases: Fastime at none against 10K Trainer by C25K®'s 6. Fastime also leads on ads (none vs shown) and update cadence (every 2 days vs every 6 weeks). On price, device support and iOS requirement there is nothing between them.

Both are free to download. 10K Trainer by C25K® sells 6 in-app purchases, starting at $4.99 per month. Fastime asks for nothing beyond the download.

10K Trainer by C25K® ships an update every 6 weeks, Fastime every 2 days. The most recent releases landed on October 26, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | 10K Trainer by C25K® | Fastime |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (22K ratings)](https://appshunter.io/ios/app/10k-trainer-by-c25k/id511600311/reviews)** | — |
| Number of ratings | **22K** | — |
| Positive reviews | 76.2% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 6 weeks | **Every 2 days** |
| Monetization | Free with in-app purchases | — |
| Size | 321 MB | 59 MB |
| Requires iOS | **14.0** | 15.1 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Zen Labs](https://appshunter.io/developer/485971738) | [Khaled Almelhem](https://appshunter.io/developer/6775435845) |

## What reviewers say

### 10K Trainer by C25K®

[App page](https://appshunter.io/ios/app/10k-trainer-by-c25k/id511600311)

This app guides beginners from sedentary to running a 10K in 14 weeks with a structured walk/run program. It features an audio coach, progress tracking, and community support. Ideal for those new to running or graduating from a 5K program.

**Highlights:** 14-week walk/run training plan, Audio coach guidance, Progress tracking, Community forums, Integration with Health app, Music integration

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

**In-app purchases (6)**

| 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 |
| Remove Ads | $1.99 | one-time |
| Go To Pro | $6.99 | one-time |

**What reviewers like**

- 🚀 Gradual increase in running challenges
- 👍 Motivating and easy to follow
- 👍 Helpful for beginners and returning runners
- 👍 Allows listening to own music
- 👍 Provides voice prompts for guidance

**What reviewers complain about**

- 🐛 Inconsistent tracking of distance and calories
- 🐛 Occasional app crashes or freezes
- 🔋 Drains battery when running with phone
- 👎 Requires subscription for advanced features

**Reported bugs**

- Timers not syncing accurately with other devices
- Workout data sometimes not recorded properly

**Requested features**

- Apple Watch integration for standalone use
- More advanced training options beyond just 10K
- Ability to customize audio prompts and volume


### Fastime

[App page](https://appshunter.io/ios/app/fastime-fasting-tracker/id6779664095)

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

**In-app purchases:** none


## Frequently asked questions

### Is 10K Trainer by C25K® free?

10K Trainer by C25K® is free to download, with in-app purchases available.

### Is Fastime free?

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

### Do 10K Trainer by C25K® or Fastime have ads?

10K Trainer by C25K® shows ads; Fastime does not.

### Which is updated more often, 10K Trainer by C25K® or Fastime?

10K Trainer by C25K® ships an update every 6 weeks, and Fastime every 2 days. Most recently, 10K Trainer by C25K® was updated on October 26, 2026 and Fastime on October 24, 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.*