# Step It Up by CHAI vs Flex

The clearest difference is update cadence: Flex at every 8 days against Step It Up by CHAI's every 3 months. Step It Up by CHAI's advantage is iOS requirement (14 vs 18.0). 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.

Step It Up by CHAI ships an update every 3 months, Flex every 8 days. The most recent releases landed on October 24, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Step It Up by CHAI | Flex |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/step-it-up-by-chai/id1522928540/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 8 days** |
| Monetization | Free | — |
| Size | 170 MB | 49 MB |
| Requires iOS | **14** | 18.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [University of North Carolina at Chapel Hill](https://appshunter.io/developer/924947571) | [FlexSante](https://appshunter.io/developer/1798915339) |

## What reviewers say

### Step It Up by CHAI

[App page](https://appshunter.io/ios/app/step-it-up-by-chai/id1522928540)

This wellness app promotes community-focused physical activity with an emphasis on exercise, healthy eating, and behavior change. It offers personalized feedback, location-based exercise opportunities, educational modules, and a social support forum. Connect your Fitbit, Aria II scale, or Omron blood pressure device for comprehensive health tracking.

**Highlights:** Community-centered physical activity, Exercise and healthy eating guidance, Personalized feedback tools, Location-based exercise triggers, Educational modules, Social support forum, Device integration (Fitbit, Aria II, Omron)

**In-app purchases:** none


### Flex

[App page](https://appshunter.io/ios/app/flex-professional/id6742541555)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Step It Up by CHAI free?

Step It Up by CHAI is free to download, with no in-app purchases.

### Is Flex free?

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

### Do Step It Up by CHAI or Flex have ads?

Neither Step It Up by CHAI nor Flex shows ads.

### Which is updated more often, Step It Up by CHAI or Flex?

Step It Up by CHAI ships an update every 3 months, and Flex every 8 days. Most recently, Step It Up by CHAI was updated on October 24, 2026 and Flex on October 28, 2026.

---

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