# 10K Trainer by C25K® vs Intervals Pro

The clearest difference is ads: Intervals Pro at none against 10K Trainer by C25K®'s shown. Intervals Pro also leads on update cadence (every 8 days vs every 6 weeks) and review sentiment (84% vs 76%). 10K Trainer by C25K®'s advantage is iOS requirement (14.0 vs 17.5). On price, rating, ratings volume and in-app purchases 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 and Intervals Pro sells 8 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.8 for 10K Trainer by C25K® against 4.8 for Intervals Pro. Both are backed by a comparable volume of ratings — 22K and 14K respectively. Written reviews are what separate them: 76% of 10K Trainer by C25K®'s written reviews are positive against 84% of Intervals Pro's.

10K Trainer by C25K® ships an update every 6 weeks, Intervals Pro every 8 days. Both last shipped on October 20, 2026.

## The numbers

| Metric | 10K Trainer by C25K® | Intervals Pro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (22K ratings)](https://appshunter.io/ios/app/10k-trainer-by-c25k/id511600311/reviews)** | [4.8 (14K ratings)](https://appshunter.io/ios/app/intervals-pro-hiit-timer/id957586938/reviews) |
| Number of ratings | **22K** | 14K |
| Positive reviews | 76.2% of reviews | **84.3% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 6 weeks | **Every 8 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 321 MB | 69 MB |
| Requires iOS | **14.0** | 17.5 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Zen Labs](https://appshunter.io/developer/485971738) | [Intervals, LLC](https://appshunter.io/developer/331071662) |

## 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


### Intervals Pro

[App page](https://appshunter.io/ios/app/intervals-pro-hiit-timer/id957586938)

Create and follow custom interval training routines for various fitness activities. This app offers extensive customization for intervals, alerts, and goals, with seamless integration for Apple Watch and Apple Health.

**Highlights:** Highly customizable intervals (time/distance), Spoken interval names and prompts, Standalone Apple Watch workouts, Workout history with Apple Health, Home screen widgets for quick launch, Bluetooth heart rate monitor support, Siri Shortcuts integration

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

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Membership | $2.99 | per month |
| Yearly Membership | $19.99 | per year |
| Generous Tip | $0.99 | one-time |
| Awesome Tip | $1.99 | one-time |
| Massive Tip | $4.99 | one-time |
| Amazing Tip | $9.99 | one-time |
| Intervals Pro (Legacy) | $69.99 | one-time |
| Lifetime Access | $69.99 | one-time |

**What reviewers like**

- 👍 Customizable timers and intervals
- 🚀 Seamless Apple Watch integration
- 💪 Helps with fitness goals and training
- 🔍 Detailed workout tracking and analytics
- 🎨 Intuitive and user-friendly interface

**What reviewers complain about**

- 🐛 Occasional sync and connectivity issues
- 🔍 Lack of clear guidance and documentation
- 💰 Paid version required for full functionality

**Reported bugs**

- Workout data not syncing correctly
- App crashes or freezes on certain devices

**Requested features**

- More customization options for interval displays
- Ability to batch delete or manage workout history
- Integration with more third-party fitness apps


## Frequently asked questions

### Is 10K Trainer by C25K® free?

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

### Is Intervals Pro free?

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

### Which has better reviews, 10K Trainer by C25K® or Intervals Pro?

10K Trainer by C25K® is rated higher. 10K Trainer by C25K® averages 4.8 out of 5 from 22K ratings, while Intervals Pro averages 4.8 from 14K ratings.

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

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

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

10K Trainer by C25K® ships an update every 6 weeks, and Intervals Pro every 8 days. Most recently, 10K Trainer by C25K® was updated on October 20, 2026 and Intervals Pro on October 20, 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.*