Custom Fitness Timer vs RX
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Custom Fitness Timer
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.
- Unlimited custom timer creation
- Countdown timer
- Interval timer
- Work/Rest timer
- Press and hold stopwatch
- Optional timer sounds
- Color-coded timer phases
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This custom fitness timer application offers: -Intuitive navigation -A Press and Hold Stop Watch -Free unlimited new timer creation -Three timer varieties: -Countdown -Interval -Work/Rest -Optional timer end and warning sounds -Color change to indicate timer phase -Customer timer naming
RX
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.
- 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
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A WOD timer in your pocket, always ready when you are. No hunting for the gym clock. No dead remote batteries. No digging through menus before a workout. RX-Timer is built for one job: start training fast, see the clock clearly, and stay focused on the work. 100% free. No account. No ads. No subscription. Just a timer that does everything you need, without getting in the way. Every workout format • Count up for AMRAP and For Time • Count down for timed efforts, with optional pre-start countdown (3, 2, 1) • Intervals with work/rest rounds for EMOM, Tabata, RFT, and chipper-style sessions • Adjust any duration down to the second. Built for the gym • Huge digits you can read from across the room. • High contrast display • Landscape full-screen mode. Tap to start, pause, or resume • Work/rest colour coding. Red and green cues like the clock at your box • Clear beeps and haptics at starts, transitions, and finish • Sound works alongside your music Stream to a TV • Mirror the timer to AirPlay displays. • Perfect when your phone is propped up or you want the whole gym to see the clock. Track your training • See how many timers you have completed and view your activity on a heat map. • Built in, on your device, with no login. Zero friction • Works offline • No sign-up required • All settings and stats stay on your phone • Sound can be turned off anytime Whether you are hitting a WOD at the box, training in the garage, or travelling without a gym clock, RX-Timer is the timer you will actually want to open every session. RX-Timer is a workout timer for functional fitness. It is not a medical device, medication reminder, or prescription app.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Custom Fitness Timer | RX |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (6 ratings) | 5.0 (1 ratings) |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 6 — better | 1 |
| Update frequency | Every 4 days — better | Every 3 weeks |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | Ad-supported | Free — better |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 13.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 15 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | Jared Rosenthal | Daniel Thrnaholm |
Customer experience
Custom Fitness Timer
RX
In-app purchases
Custom Fitness Timer
No in-app purchases
RX
No in-app purchases
Questions
Is Custom Fitness Timer free?
Is RX free?
Which has better reviews, Custom Fitness Timer or RX?
Do Custom Fitness Timer or RX have ads?
Which is updated more often, Custom Fitness Timer or RX?
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