Comparison

RX vs Aldo Coach

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

Head to head
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.

About

Aldo Coach

This app dynamically adjusts your strength training program based on your logged performance and feedback. It builds personalized, periodized plans that adapt to your schedule and goals, offering real-time coaching for every set.

Highlights
  • Dynamic program adjustments based on logged sets
  • Personalized periodized training plans
  • Real-time coaching feedback per set
  • Calendar integration for scheduling
  • Supports various goals (powerlifting, bodybuilding, etc.)
  • Pain tracking and injury-aware programming
  • Extensive training history and import options
  • Offline functionality
Features
Read full description

Most training apps hand you a program and never touch it again. Other workout apps with an AI will talk to you all day while the workout on screen doesn't move. Aldo does the thing neither does: it changes the actual program, in front of you, because of something you said or something you logged. COACHES EVERY SET Your session is written before you walk in — the lifts, the loads, the reps. Log a set and Aldo answers underneath it: what that rep speed meant, and what it's doing about it. Not a chat you have to go and open. A line under the set you just finished. Hit a top set written at RPE 8 and finish it at 6, and the back-off sets below are already written back up, waiting on one tap: Accept or Keep. BUILDS YOUR PLAN Tell Aldo your goal, your equipment, and how you train. It writes a full periodized program, week by week — not a template with your name on it. Then it plans around the weeks you actually have: sync your calendar and a work trip or a late shift becomes part of the plan instead of the reason you fell off it. ANY GOAL Powerlifting, CrossFit, bodybuilding, or just staying in the game for another thirty years. Conditioning is first-class, not bolted onto a lifting app — an EMOM, an AMRAP, a circuit or a complex is written with real numbers, runs on its own timer, and gets scored when you're done. YOU SET THE CEILING Coming back from something? Give Aldo a pain score with each set and it tracks the trend across the load, not just the last reading. Quiet at 185, still quiet at 225, and the session keeps going. Cross the ceiling you set and Aldo flags it and proposes a lighter set, even when the lift itself felt easy. Proposed, not imposed. You tap Apply. REMEMBERS EVERYTHING Mention a sore shoulder once and Aldo files it: what aggravates it, what doesn't, and a ceiling on the lift that caused it until it's been quiet for a couple of sessions. It programs around it without being asked again. The same memory holds your working loads, your equipment, and the fact that you'd rather be out of the gym in an hour on a weekday. All of it is yours to read and edit. YEARS OF HISTORY Every lift has its own page — estimated 1RM over time, your best single, triple, five and eight, and every session you've ever done it. It's not just a chart to look at: it's the same history Aldo reads before it writes your next session. Already training? Upload a spreadsheet or a PDF of your log and Aldo will read it in. WORKS OFFLINE Your program, your history, and today's session live on your device and don't disappear without a signal. Sending a message to your coach needs a connection, like any AI feature does — the app itself doesn't. YOUR DATA Your training data is yours. It's used to run your coaching, never sold and never used for advertising. WHAT ALDO IS NOT Not a doctor, a physio, or a medical device. It doesn't diagnose or treat anything and it can't clear you to return from an injury. It's not a replacement for a coach who can watch you lift, and it isn't infallible — it's an AI model and it can be wrong. Read the Health & Safety Notice before you train with it. Aldo is built and run by River Lentil LLC, a single-member California LLC with no staff — one person writes the code and answers the support mail. Questions, problems, or a deletion request: support@aldo-coach.app. We reply within 3 business days.

Screenshots

RX4 screens
Aldo Coach4 screens

Verdict

The call

The clearest difference is update cadence: Aldo Coach at every 2 days against RX's every 3 weeks. Aldo Coach also leads on ratings volume (6 vs 1) and iOS requirement (15.0 vs 17.0). On price, rating, review sentiment and ads 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 RX against 5.0 for Aldo Coach. That said, the two scores are not equally well evidenced: Aldo Coach 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

RX ships an update every 3 weeks, Aldo Coach every 2 days. The most recent releases landed on September 24, 2026 and September 23, 2026 respectively.

Scorecard3 real differences · 7 level
RX versus Aldo Coach: the parameters behind the verdict, then further details
ParameterRXAldo Coach
PriceFreeFree
Rating5.0 (1 ratings)5.0 (6 ratings)
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings16 — better
Update frequencyEvery 3 weeksEvery 2 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhoneiPhone, iPod — better
Requires iOS17.015.0 — better
Further details — not scored
Size4 MB16 MB
Age rating4+12+
DeveloperDaniel ThrnaholmRiver Lentil LLC

Customer experience

RX

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

Aldo Coach

All ratings6 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews5 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

RX

No in-app purchases

None

Aldo Coach

No in-app purchases

Questions

Is RX free?
RX is free to download, with no in-app purchases.
Is Aldo Coach free?
Aldo Coach is free to download, with no in-app purchases.
Which has better reviews, RX or Aldo Coach?
RX and Aldo Coach are both rated 5.0 out of 5 on the App Store, from 1 and 6 ratings respectively.
Do RX or Aldo Coach have ads?
Neither RX nor Aldo Coach shows ads.
Which is updated more often, RX or Aldo Coach?
RX ships an update every 3 weeks, and Aldo Coach every 2 days. Most recently, RX was updated on September 24, 2026 and Aldo Coach on September 23, 2026.

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