# Flex3 vs Health Tracker Kit

The clearest difference is in-app purchases: Flex3 at none against Health Tracker Kit's 4. Flex3 also leads on iOS requirement (12.0 vs 15.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Health Tracker Kit sells 4 in-app purchases, starting at $4.99 per 7 days. Flex3 asks for nothing beyond the download.

Flex3 ships an update every 5 weeks, Health Tracker Kit every 2 months. The most recent releases landed on May 28, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | Flex3 | Health Tracker Kit |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.0 (2 ratings)](https://appshunter.io/ios/app/health-tracker-kit/id6544808031/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 2 months |
| Monetization | — | Freemium |
| Size | 29 MB | 124 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Aravind Athreya](https://appshunter.io/developer/1552166670) | [Webron Software LTD](https://appshunter.io/developer/1071126548) |

## What reviewers say

### Flex3

[App page](https://appshunter.io/ios/app/flex3/id6459503860)

**Features:** macOS Compatibility

**In-app purchases:** none


### Health Tracker Kit

[App page](https://appshunter.io/ios/app/health-tracker-kit/id6544808031)

Consolidate all your health data from various trackers into one convenient app. Analyze daily activity, heart rate, sleep, nutrition, workouts, blood pressure, and body measurements with easy-to-understand reports and visualizations.

**Highlights:** Daily activity summary, Heart rate monitoring, Sleep analysis, Nutrition intake logging, Workout tracking, Blood pressure readings, Body measurements

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| HealthKit Weekly Subscription | $4.99 | per 7 days |
| HealthKit Premium Monthly | $4.99 | per month |
| HealthKit Yearly Subscription | $24.99 | per year |
| HealthKit Lifetime Premium | $29.99 | one-time |


## Frequently asked questions

### Is Flex3 free?

Flex3 is free to download, with no in-app purchases.

### Is Health Tracker Kit free?

Health Tracker Kit is free to download, with in-app purchases available.

### Do Flex3 or Health Tracker Kit have ads?

Neither Flex3 nor Health Tracker Kit shows ads.

### Which is updated more often, Flex3 or Health Tracker Kit?

Flex3 ships an update every 5 weeks, and Health Tracker Kit every 2 months. Most recently, Flex3 was updated on May 28, 2026 and Health Tracker Kit on October 13, 2026.

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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.*