# Custom Fitness Timer vs RX

The clearest difference is ads: RX at none against Custom Fitness Timer's shown. RX also leads on monetization model (free vs ad-supported). Custom Fitness Timer's advantage is update cadence (every 4 days vs every 3 weeks) and ratings volume (6 vs 1). On price, rating, review sentiment and in-app purchases there is nothing between them.

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

On the App Store both sit at effectively the same score — 5.0 for Custom Fitness Timer against 5.0 for RX. That said, the two scores are not equally well evidenced: Custom Fitness Timer has 6 ratings behind it against 1, so its average is the more settled of the two. Written reviews split almost evenly too, at 100% and 100% positive.

Custom Fitness Timer ships an update every 4 days, RX every 3 weeks. The most recent releases landed on September 29, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Custom Fitness Timer | RX |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (6 ratings)](https://appshunter.io/ios/app/custom-fitness-timer/id6448923014/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/rx-timer-wod-timer/id6783471287/reviews) |
| Number of ratings | **6** | 1 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 4 days** | Every 3 weeks |
| Monetization | Ad-supported | **Free** |
| Size | 15 MB | 4 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Jared Rosenthal](https://appshunter.io/developer/1686932132) | [Daniel Thrnaholm](https://appshunter.io/developer/6783471289) |

## What reviewers say

### Custom Fitness Timer

[App page](https://appshunter.io/ios/app/custom-fitness-timer/id6448923014)

Create and manage custom timers for various fitness activities like countdowns, intervals, and work/rest periods. Features include intuitive navigation, a press-and-hold stopwatch, and optional sound alerts. Personalize timers with custom names and colors to match different phases.

**Highlights:** Unlimited custom timer creation, Countdown timer, Interval timer, Work/Rest timer, Press and hold stopwatch, Optional timer sounds, Color-coded timer phases

**In-app purchases:** none


### RX

[App page](https://appshunter.io/ios/app/rx-timer-wod-timer/id6783471287)

This app provides a versatile workout timer designed for functional fitness. It supports various training formats like AMRAP, EMOM, and Tabata with customizable durations and clear visual cues. The app offers offline functionality, a high-contrast display, and the ability to stream to external screens.

**Highlights:** Multiple workout formats (AMRAP, EMOM, Tabata, RFT), Customizable work/rest intervals, Large, high-contrast display, Landscape full-screen mode, Work/rest color coding, Stream timer to TV via AirPlay, Offline functionality

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

**In-app purchases:** none


## Frequently asked questions

### Is Custom Fitness Timer free?

Custom Fitness Timer is free to download, with no in-app purchases.

### Is RX free?

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

### Which has better reviews, Custom Fitness Timer or RX?

Custom Fitness Timer and RX are both rated 5.0 out of 5 on the App Store, from 6 and 1 ratings respectively.

### Do Custom Fitness Timer or RX have ads?

Custom Fitness Timer shows ads; RX does not.

### Which is updated more often, Custom Fitness Timer or RX?

Custom Fitness Timer ships an update every 4 days, and RX every 3 weeks. Most recently, Custom Fitness Timer was updated on September 29, 2026 and RX on October 11, 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.*