# Prevent vs Isobar

Prevent and Isobar are too close to call on the numbers: across 8 compared parameters — price, review sentiment, update cadence and ads among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Prevent ships an update monthly, Isobar every 2 months. The most recent releases landed on September 1, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | Prevent | Isobar |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (9 ratings)](https://appshunter.io/ios/app/prevent/id1121375378/reviews)** | — |
| Number of ratings | **9** | — |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 2 months |
| Monetization | Free | Free |
| Size | 46 MB | 73 MB |
| Requires iOS | 16.4 | 16.4 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Prevent Biometrics, Inc](https://appshunter.io/developer/1121375377) | [Advanced Therapeutic Materials Ltd](https://appshunter.io/developer/1717644630) |

## 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


### Isobar

[App page](https://appshunter.io/ios/app/isobar/id6477287729)

Design and order custom-fit compression socks from home. This app uses your phone's camera to create a 3D model of your legs for a perfect fit, helping to reduce DVT risk and alleviate travel-related leg discomfort.

**Highlights:** Custom compression sock ordering, 3D leg scanning via mobile video, Personalized fit and style selection, Direct-to-door delivery, DVT risk reduction, Alleviate heavy legs and jet lag

**Features:** Apple Wallet

**In-app purchases:** none


## Frequently asked questions

### Is Prevent free?

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

### Is Isobar free?

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

### Do Prevent or Isobar have ads?

Neither Prevent nor Isobar shows ads.

### Which is updated more often, Prevent or Isobar?

Prevent ships an update monthly, and Isobar every 2 months. Most recently, Prevent was updated on September 1, 2026 and Isobar on September 28, 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.*