# ACT Head Impact Tracker vs NinjaTrainer

The clearest difference is in-app purchases: ACT Head Impact Tracker at none against NinjaTrainer's 4. ACT Head Impact Tracker also leads on device support (3 vs 1) and iOS requirement (14.0 vs 16.4). NinjaTrainer's advantage is update cadence (every 6 days vs every 6 months) and ratings volume (3 vs 1). On price, rating and ads there is nothing between them.

Both are free to download. NinjaTrainer sells 4 in-app purchases, starting at $7.99 per month. ACT Head Impact Tracker asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for ACT Head Impact Tracker against 5.0 for NinjaTrainer. Both are backed by a comparable volume of ratings — 1 and 3 respectively.

ACT Head Impact Tracker ships an update every 6 months, NinjaTrainer every 6 days. The most recent releases landed on October 24, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | ACT Head Impact Tracker | NinjaTrainer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/act-head-impact-tracker/id6504392807/reviews) | [5.0 (3 ratings)](https://appshunter.io/ios/app/ninjatrainer-team-training/id6748374238/reviews) |
| Number of ratings | 1 | **3** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 6 days** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 8 MB | 91 MB |
| Requires iOS | **14.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 12+ |
| Developer | [Northern Sports Insight and Intelligence Oy](https://appshunter.io/developer/1752073752) | [Dragonscale Labs LLC](https://appshunter.io/developer/1825541136) |

## What reviewers say

### ACT Head Impact Tracker

[App page](https://appshunter.io/ios/app/act-head-impact-tracker/id6504392807)

This app measures and tracks impacts and forces on the head during dry-land sports. It's designed for athletes, coaches, and teams to monitor head events across various levels and age groups.

**Highlights:** Impact and force measurement, Head event tracking, Versatile sports application, Suitable for individual athletes or teams, Supports all ages above 3, Affordable tracking device

**Features:** macOS Compatibility

**In-app purchases:** none


### NinjaTrainer

[App page](https://appshunter.io/ios/app/ninjatrainer-team-training/id6748374238)

This platform helps ninja and obstacle course racing athletes, coaches, and parents track training, manage teams, and discover events. It offers custom course timing, skill logging, team leaderboards, and direct messaging for seamless communication and progress monitoring.

**Highlights:** Custom obstacle course timing, Skill logging and progress tracking, Team management with QR codes, Live team leaderboards, Built-in team chat, Event discovery and management, Gym finder

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Plus - Monthly | $7.99 | per month |
| Pro - Monthly | $14.99 | per month |
| Plus - Annual | $79.99 | per year |
| Pro - Annual | $129.99 | per year |


## Frequently asked questions

### Is ACT Head Impact Tracker free?

ACT Head Impact Tracker is free to download, with no in-app purchases.

### Is NinjaTrainer free?

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

### Which has better reviews, ACT Head Impact Tracker or NinjaTrainer?

ACT Head Impact Tracker and NinjaTrainer are both rated 5.0 out of 5 on the App Store, from 1 and 3 ratings respectively.

### Do ACT Head Impact Tracker or NinjaTrainer have ads?

Neither ACT Head Impact Tracker nor NinjaTrainer shows ads.

### Which is updated more often, ACT Head Impact Tracker or NinjaTrainer?

ACT Head Impact Tracker ships an update every 6 months, and NinjaTrainer every 6 days. Most recently, ACT Head Impact Tracker was updated on October 24, 2026 and NinjaTrainer on October 5, 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.*