# Prevent vs Asira Core

The clearest difference is in-app purchases: Prevent at none against Asira Core's 2. Prevent also leads on iOS requirement (16.4 vs 26.2). Asira Core's advantage is update cadence (every 8 days vs monthly). On price, rating, review sentiment and ratings volume there is nothing between them.

Both are free to download. Asira Core sells 2 in-app purchases, starting at $9.99 per month. Prevent asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for Prevent against 5.0 for Asira Core. Both are backed by a comparable volume of ratings — 9 and 14 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

Prevent ships an update monthly, Asira Core every 8 days. The most recent releases landed on October 2, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Prevent | Asira Core |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (9 ratings)](https://appshunter.io/ios/app/prevent/id1121375378/reviews) | [5.0 (14 ratings)](https://appshunter.io/ios/app/asira-core/id6797598768/reviews) |
| Number of ratings | 9 | **14** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 8 days** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 46 MB | 58 MB |
| Requires iOS | **16.4** | 26.2 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 12+ |
| Developer | [Prevent Biometrics, Inc](https://appshunter.io/developer/1121375377) | [Asira LLC](https://appshunter.io/developer/6797598770) |

## What reviewers say

### Prevent

[App page](https://appshunter.io/ios/app/prevent/id1121375378)

This app pairs with a special mouthguard to monitor head impacts in real-time. It provides detailed data on acceleration, direction, and load for each impact, helping teams and parents assess player safety and identify athletes needing evaluation.

**Highlights:** Real-time head impact data, Linear and rotational acceleration tracking, Impact direction and location analysis, Impact Load measurement, Player and team data views, Live alerts for high-magnitude impacts

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

**In-app purchases:** none


### Asira Core

[App page](https://appshunter.io/ios/app/asira-core/id6797598768)

This app tracks your calories, sleep, and recovery using your Apple Health data. It provides daily scores for flow, sleep, intensity, and stress, and offers personalized coaching to help you understand and improve your health.

**Highlights:** Daily health scores (Flow, Sleep, Intensity, Stress), AI-powered meal logging with photo/barcode scan, Personalized calorie and macro targets, AI coaching from 'Ari' for recovery insights, Morning vitals tracking (HR, HRV, temperature), Weight and water logging, Long-term trend analysis

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Asira+ - Monthly | $9.99 | per month |
| Asira+ - Annual | $99.99 | per year |


## Frequently asked questions

### Is Prevent free?

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

### Is Asira Core free?

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

### Which has better reviews, Prevent or Asira Core?

Prevent and Asira Core are both rated 5.0 out of 5 on the App Store, from 9 and 14 ratings respectively.

### Do Prevent or Asira Core have ads?

Neither Prevent nor Asira Core shows ads.

### Which is updated more often, Prevent or Asira Core?

Prevent ships an update monthly, and Asira Core every 8 days. Most recently, Prevent was updated on October 2, 2026 and Asira Core on October 10, 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.*