# Calf Raise vs KINVENT

The clearest difference is review sentiment: KINVENT at 80% against Calf Raise's 20%. KINVENT also leads on rating (5.0 vs 3.9). Calf Raise's advantage is in-app purchases (none vs 8) and ratings volume (14 vs 3). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. KINVENT sells 8 in-app purchases, starting at $34.99 per month. Calf Raise asks for nothing beyond the download.

KINVENT holds the better App Store score, 5.0 against 3.9. Both are backed by a comparable volume of ratings — 14 and 3 respectively. Written reviews point the same way: 20% of Calf Raise's written reviews are positive against 80% of KINVENT's.

Calf Raise ships an update monthly, KINVENT every 3 weeks. Both last shipped on September 16, 2026.

## The numbers

| Metric | Calf Raise | KINVENT |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.9 (14 ratings)](https://appshunter.io/ios/app/calf-raise/id1507737701/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/kinvent/id1625709856/reviews)** |
| Number of ratings | **14** | 3 |
| Positive reviews | 20.0% of reviews | **80.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 3 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 30 MB | 473 MB |
| Requires iOS | **12.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Kim Hebert-Losier](https://appshunter.io/developer/1507737700) | [KINVENT BIOMECANIQUE](https://appshunter.io/developer/1346120156) |

## What reviewers say

### Calf Raise

[App page](https://appshunter.io/ios/app/calf-raise/id1507737701)

This app uses your device's camera to analyze calf raise performance through video. It measures height, power, and work, and calculates a fatigue index. Track progress over time and compare left and right leg performance.

**Highlights:** Video analysis of calf raises, Measures heel height, power, and work, Calculates fatigue index, Supports external load for strength testing, Multi-user support, Data export to CSV, Integrated metronome

**Features:** macOS Compatibility

**In-app purchases:** none


### KINVENT

[App page](https://appshunter.io/ios/app/kinvent/id1625709856)

This app empowers health and sports professionals to precisely track motion, force, and recovery. It offers real-time biofeedback, over 100 guided protocols, and personalized patient profiles with comprehensive reporting. Works offline with local data storage and optional cloud syncing.

**Highlights:** Real-time biofeedback with visualizations, Over 100 guided protocols, Personalized patient profiles, Offline assessment capability, Local and cloud data storage, Multilingual support

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

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Kforce Pro Monthly Licence | $34.99 | per month |
| Starter Monthly License | $34.99 | per month |
| Premium Monthly License | $59.99 | per month |
| Kforce Pro+ Monthly Licence | $114.99 | per month |
| Excellence Monthly Licence | $114.99 | per month |
| Kforce Pro Yearly Licence | $349.99 | per year |
| Starter Yearly License | $349.99 | per year |
| Premium Yearly Licence | $599.99 | per year |


## Frequently asked questions

### Is Calf Raise free?

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

### Is KINVENT free?

KINVENT is free to download, with in-app purchases available.

### Which has better reviews, Calf Raise or KINVENT?

KINVENT is rated higher. Calf Raise averages 3.9 out of 5 from 14 ratings, while KINVENT averages 5.0 from 3 ratings.

### Do Calf Raise or KINVENT have ads?

Neither Calf Raise nor KINVENT shows ads.

### Which is updated more often, Calf Raise or KINVENT?

Calf Raise ships an update monthly, and KINVENT every 3 weeks. Most recently, Calf Raise was updated on September 16, 2026 and KINVENT on September 16, 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.*