Performance Unit vs MuscleLight
Price, ratings, monetisation and update history for both apps, side by side ā with what reviewers say about each.
Performance Unit
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With the Performance Unit App, you can start tracking your nutrition & workouts, measuring results, and achieving your fitness goals, all with the help of your personal trainer. - Set health and fitness goals - Track progress towards your goals - Manage your nutrition intake as prescribed by your coach - Schedule workouts and stay committed by beating your personal bests - Access training plans and track workouts - Message your coach in real-time - Track body measurements and take progress photos - Get push notification reminders for scheduled workouts and activities - Connect to wearable devices like Apple Watch (healthkit), Fitbit and Withings to sync body stats instantly Download the app today!
MuscleLight
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MuscleLight is an app accompanying RedStep device that supports your general wellness and relaxation routines through gentle, light-based sessions. It helps you unwind, stay consistent with healthy habits, and enjoy moments of recovery anytime, anywhere. App features: ⢠Connect and control your external RedStep wellness device ⢠Create customized light sessions for relaxation and daily comfort ⢠Track your usage and set helpful reminders ⢠Explore routines that support balance and wellbeing Important information: ⢠The MuscleLight App requires the external RedStep device to function. ⢠The MuscleLight App and RedStep device are not medical devices. ⢠They do not diagnose, treat, cure, or prevent any disease or medical condition. ⢠All information provided is for general wellness purposes only. ⢠If you have health concerns or persistent discomfort, consult a qualified healthcare professional. Experience calm, comfort, and relaxation with MuscleLight ā your personal wellness companion.
Screenshots
Verdict
The clearest difference is device support: Performance Unit at 4 against MuscleLight's 1. On price, update cadence, ads and in-app purchases there is nothing between them.
Scored on Price Ā· Rating Ā· Positive reviews Ā· Number of ratings Ā· Update frequency Ā· Ads Ā· In-app purchases Ā· Monetization Ā· Best chart rank Ā· Devices Ā· Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Performance Unit ships an update every 6 weeks, MuscleLight monthly. The most recent releases landed on May 17, 2026 and September 8, 2026 respectively.
| Parameter | Performance Unit | MuscleLight |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 6 weeks | Monthly ā better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod, Apple Watch ā better | iPhone |
| Requires iOS | 15.1 ā better | 16.4 |
| Further details ā not scored | ||
| Size | 205 MB | 52 MB |
| Age rating | 4+ | 17+ |
| Developer | Selkrig Performance | Recolth Oy |
In-app purchases
Performance Unit
No in-app purchases
MuscleLight
No in-app purchases









