CapnoTrainer vs PrO2+
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
CapnoTrainer
Read full descriptionHide full description
CapnoTrainer iOS app is a great substitution for CapnoTrainer desktop app in case you would like to record session remotely. The app connects to your instrument's Bluetooth and allows you to record session and provide multiple different graphical analysis.
PrO2+
This app connects to respiratory muscle trainer devices to measure and improve breathing strength. It's designed for individuals looking to enhance respiratory performance through guided training sessions. Consult a physician if you have respiratory health conditions before use.
- Respiratory muscle training
- Breathing strength assessment
- Resisted breathing measurements
- Performance improvement tracking
- Device connectivity
Read full descriptionHide full description
This is the companion app for the PrO2 Respiratory Muscle Trainer products. The PrO2 devices are used to assess and improve respiratory strength and performance through resisted breathing measurements and training. Individuals who are not in good health or have any respiratory related medical condition should consult their physician before using PrO2. This PrO2 device and apps are classified as Class II medical devices that are exempt from premarket notification requirements under regulations of the U.S. Food and Drug Administration (FDA). The manufacturer is registered with the FDA and the device is listed in accordance with applicable U.S. regulatory requirements. For regions outside the US, refer to local guidance for the use of the PrO2 device for medical purposes. The PrO2 devices are FCC approved (2AX05-PRO2FIT) and CE registered.
Screenshots
Verdict
The clearest difference is iOS requirement: CapnoTrainer at 13.0 against PrO2+'s 17.0. On price, update cadence, ads 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.
Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on September 29, 2026 and October 6, 2026 respectively.
| Parameter | CapnoTrainer | PrO2+ |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 13.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 54 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | Muhammad Arshad Khan | PrO2HEALTH |
In-app purchases
CapnoTrainer
No in-app purchases
PrO2+
No in-app purchases
