Comparison

OnnaFit vs RSP App

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

Head to head
About

OnnaFit

Features
Read full description

App Destinada al mundo de la estética, ONNAFIT hace fácil el trabajo diario y la gestión de los tratamientos

About

RSP App

Features
Read full description

RSP APP: High-Performance Training Application The digital extension of the Isoinertial (Eccentric) machines manufactured by einercial.com. RSP APP measures training performance in real-time via a Bluetooth streaming data connection. Performance is measured in power output (watts) and work cycles. Using these two indicators, the app provides users with valuable insights into their machine usage and performance. Users can save and review their training history. The app includes presets for each of the three machines that feature the hardware connection terminal. HOW DOES IT WORK? The system consists of a hardware component connected to the machine (compatible with any model from the manufacturer). This hardware is a rotary encoder, a high-tech device capable of registering up to 1,000 points per rotation of the yo-yo. On the other end, the app receives and processes this data. Let’s dive into the details: THE ROTARY ENCODER • Completely wireless: The RSP encoder is designed with ergonomics and usability in mind. • Long-lasting battery: It features a rechargeable battery with a standard female mini USB connector for charging with any standard mobile charger. EASY INSTALLATION ON RSP MACHINES: JUST CONNECT AND GO The encoder fits all RSP machines. It attaches using three small standard screws. DATA TRANSMISSION VIA BLUETOOTH The connection to the app is through Bluetooth, ensuring a fast and reliable link. The encoder sends data to the app, allowing you to move up to 15 meters away—ideal for trainers. BASIC WORKFLOW WITH THE APP 1. CONNECT THE APP TO A MACHINE Once the encoder is turned on and Bluetooth is enabled on your phone, the app will detect the signal and prompt you to select a machine. It will also request mass (weight) configuration. Once both are confirmed, you can start training. 2. START TRAINING: COACH MODE Another option, particularly useful for personal trainers or gym instructors, is to register multiple athletes in the same session. You can add as many as needed, recording the strength values for each individual and creating a comprehensive session history. 3. REAL-TIME PERFORMANCE MONITORING The app displays the machine and its selected mass configuration on the screen. It also shows real-time performance data, including power per cycle, time, power output, and other session details—all live on your screen. OTHER TRAINING MODES FOR HIGH-PERFORMANCE CIRCUITS Once familiar with the machine and its limitations, you can choose a training mode based on power ranges. The app leverages session history to provide data on strength ratios, best performances, and their correlation with lower scores. With this information, you can select training modes based on maximum and minimum power ranges, challenging yourself to stay within the interval. RSP Inertial Performance | Tools for Athletes

Screenshots

OnnaFit4 screens
RSP App4 screens

Verdict

The call

The clearest difference is update cadence: OnnaFit at every 3 weeks against RSP App's every 2 months. OnnaFit also leads on iOS requirement (11.0 vs 13.0). On price, ads, in-app purchases and device support 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.

UpkeepUpdate frequency

OnnaFit ships an update every 3 weeks, RSP App every 2 months. The most recent releases landed on October 15, 2026 and October 12, 2026 respectively.

Scorecard2 real differences · 4 level
OnnaFit versus RSP App: the parameters behind the verdict, then further details
ParameterOnnaFitRSP App
PriceFreeFree
Update frequencyEvery 3 weeks — betterEvery 2 months
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS11.0 — better13.0
Further details — not scored
Size116 MB23 MB
Age rating4+4+
DeveloperWIEMSPRO SLInercial Performance Sl.

In-app purchases

None

OnnaFit

No in-app purchases

None

RSP App

No in-app purchases

Questions

Is OnnaFit free?
OnnaFit is free to download, with no in-app purchases.
Is RSP App free?
RSP App is free to download, with no in-app purchases.
Do OnnaFit or RSP App have ads?
Neither OnnaFit nor RSP App shows ads.
Which is updated more often, OnnaFit or RSP App?
OnnaFit ships an update every 3 weeks, and RSP App every 2 months. Most recently, OnnaFit was updated on October 15, 2026 and RSP App on October 12, 2026.

Other comparisons