# CPR Responder Pro vs Flex

The clearest difference is iOS requirement: Flex at 18.0 against CPR Responder Pro's 26.2. On price, ads, in-app purchases and device support there is nothing between them.

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

## The numbers

| Metric | CPR Responder Pro | Flex |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (7 ratings)](https://appshunter.io/ios/app/flex-workout-tracker/id6758920531/reviews)** |
| Number of ratings | — | **7** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | — | Every 6 months |
| Monetization | — | Free |
| Size | 5 MB | 3 MB |
| Requires iOS | 26.2 | **18.0** |
| Devices | **iPhone, iPad, Apple Watch** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Oscar Yasser Pena Zapata](https://appshunter.io/developer/1864408189) | [KEVIN BROWN](https://appshunter.io/developer/1803158449) |

## What reviewers say

### CPR Responder Pro

[App page](https://appshunter.io/ios/app/cpr-responder-pro/id6758683686)

**Features:** macOS Compatibility

**In-app purchases:** none


### Flex

[App page](https://appshunter.io/ios/app/flex-workout-tracker/id6758920531)

Effortlessly track your strength training progress, build personalized workout routines, and visualize your lifts with an intelligent plate calculator. Syncs data across devices using iCloud for seamless access and prioritizes privacy with Sign in with Apple.

**Highlights:** Effortless workout tracking, Personalized workout templates, Customizable workout folders, Smart Plate Calculator, Cross-device iCloud sync, Privacy-focused with Sign in with Apple

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is CPR Responder Pro free?

CPR Responder Pro is free to download, with no in-app purchases.

### Is Flex free?

Flex is free to download, with no in-app purchases.

### Do CPR Responder Pro or Flex have ads?

Neither CPR Responder Pro nor Flex shows ads.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*