# Simple Gym Trainer vs RUN interval

The clearest difference is price: RUN interval at Free against Simple Gym Trainer's $0.99. RUN interval also leads on iOS requirement (15.6 vs 17.0). Simple Gym Trainer's advantage is in-app purchases (none vs 2) and update cadence (every 3 weeks vs every 3 months). On ads and device support there is nothing between them.

RUN interval is free to download; Simple Gym Trainer costs $0.99 up front. RUN interval sells 2 one-off in-app purchases. Simple Gym Trainer asks for nothing beyond the download.

Simple Gym Trainer ships an update every 3 weeks, RUN interval every 3 months. The most recent releases landed on September 22, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | Simple Gym Trainer | RUN interval |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | — | **[4.7 (1K ratings)](https://appshunter.io/ios/app/run-interval-running-timer/id1352270752/reviews)** |
| Number of ratings | — | **1K** |
| Positive reviews | — | 77.5% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 3 months |
| Monetization | — | Free with in-app purchases |
| Size | 0 MB | 34 MB |
| Requires iOS | 17.0 | **15.6** |
| Devices | iPhone, iPad | **iPhone, iPod, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Simpler Software](https://appshunter.io/developer/392250183) | [CAN YOU HEAR ME SOFTWARE](https://appshunter.io/developer/711042540) |

## What reviewers say

### Simple Gym Trainer

[App page](https://appshunter.io/ios/app/simple-gym-trainer/id392250180)

**Features:** macOS Compatibility

**In-app purchases:** none


### RUN interval

[App page](https://appshunter.io/ios/app/run-interval-running-timer/id1352270752)

This app simplifies interval and Fartlek running by allowing you to set custom targets for time or distance during hard, easy, and rest efforts. It offers detailed post-run summaries, audio and visual feedback, and an Apple Watch app for enhanced training.

**Highlights:** Customizable interval sessions, Time and distance targets, Distance Goal option, Audio and visual feedback, Detailed run summaries, Apple Watch app, Strava sharing

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| The full RUN interval | $1.99 | one-time |
| The full RUN interval | $3.99 | one-time |


## Frequently asked questions

### Is Simple Gym Trainer free?

Simple Gym Trainer costs $0.99, with no in-app purchases.

### Is RUN interval free?

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

### Do Simple Gym Trainer or RUN interval have ads?

Neither Simple Gym Trainer nor RUN interval shows ads.

### Which is updated more often, Simple Gym Trainer or RUN interval?

Simple Gym Trainer ships an update every 3 weeks, and RUN interval every 3 months. Most recently, Simple Gym Trainer was updated on September 22, 2026 and RUN interval on September 25, 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.*