# SUND vs KINVENT

SUND and KINVENT both sit at 5.0 stars, but that hides the real split: 100% of SUND's written reviews are positive against 80% of KINVENT's. SUND also leads on iOS requirement (13.0 vs 15.6). On price, rating, ratings volume and update cadence there is nothing between them.

Both are free to download. SUND sells 2 in-app purchases, starting at $1.99 per month and KINVENT sells 8 in-app purchases, starting at $34.99 per month. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 5.0 for SUND against 5.0 for KINVENT. Both are backed by a comparable volume of ratings — 2 and 3 respectively. Written reviews are what separate them: 100% of SUND's written reviews are positive against 80% of KINVENT's.

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on June 1, 2026 and September 16, 2026 respectively.

## The numbers

| Metric | SUND | KINVENT |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (2 ratings)](https://appshunter.io/ios/app/sund/id1568238194/reviews) | [5.0 (3 ratings)](https://appshunter.io/ios/app/kinvent/id1625709856/reviews) |
| Number of ratings | 2 | **3** |
| Positive reviews | **100.0% of reviews** | 80.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Monetization | Freemium | Free with in-app purchases |
| Size | 20 MB | 473 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Colin Macintosh](https://appshunter.io/developer/1523864917) | [KINVENT BIOMECANIQUE](https://appshunter.io/developer/1346120156) |

## What reviewers say

### SUND

[App page](https://appshunter.io/ios/app/sund/id1568238194)

This app provides a tranquil experience through gentle vibrations and calming audio. It's designed to help users relax and find a sense of peace. Enjoy a soothing escape from daily stress.

**Highlights:** Emits vibration, Plays soothing sounds, Promotes relaxation, Offers a calming experience, Designed for stress relief

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| One month subscription | $1.99 | per month |
| One year subscription | $19.99 | per year |


### 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 SUND free?

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

### Is KINVENT free?

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

### Which has better reviews, SUND or KINVENT?

SUND and KINVENT are both rated 5.0 out of 5 on the App Store, from 2 and 3 ratings respectively.

### Do SUND or KINVENT have ads?

Neither SUND nor KINVENT shows ads.

### Which is updated more often, SUND or KINVENT?

SUND ships an update every 3 weeks, and KINVENT every 3 weeks. Most recently, SUND was updated on June 1, 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.*