Comparison

Custom Fitness Timer vs RX

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • Unlimited custom timer creation
  • Countdown timer
  • Interval timer
  • Work/Rest timer
  • Press and hold stopwatch
  • Optional timer sounds
  • Color-coded timer phases
Read full description

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

About

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.

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
Read full description

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

Custom Fitness Timer4 screens
RX4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard5 real differences · 5 level
Custom Fitness Timer versus RX: the parameters behind the verdict, then further details
ParameterCustom Fitness TimerRX
PriceFreeFree
Rating5.0 (6 ratings)5.0 (1 ratings)
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings6 — better1
Update frequencyEvery 4 days — betterEvery 3 weeks
AdsYesNo — better
In-app purchasesNoNo
MonetizationAd-supportedFree — better
DevicesiPhone, iPod — betteriPhone
Requires iOS13.0 — better17.0
Further details — not scored
Size15 MB4 MB
Age rating4+4+
DeveloperJared RosenthalDaniel Thrnaholm

Customer experience

Custom Fitness Timer

All ratings6 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews3 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

RX

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Custom Fitness Timer

No in-app purchases

None

RX

No in-app purchases

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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