# Whatzit vs ActaStim Sync

The clearest difference is rating: Whatzit at 4.7 against ActaStim Sync's 4.0. Whatzit also leads on review sentiment (82% vs 50%) and chart position (#44 vs unranked). ActaStim Sync's advantage is in-app purchases (none vs 5) and update cadence (every 3 weeks vs every 6 weeks). On price, ratings volume, ads and device support there is nothing between them.

Both are free to download. Whatzit sells 3 in-app purchases, starting at $29.99 per month. ActaStim Sync asks for nothing beyond the download.

Whatzit holds the better App Store score, 4.7 against 4.0. Both are backed by a comparable volume of ratings — 38 and 27 respectively. Written reviews point the same way: 82% of Whatzit's written reviews are positive against 50% of ActaStim Sync's.

Whatzit ships an update every 6 weeks, ActaStim Sync every 3 weeks. The most recent releases landed on October 16, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Whatzit | ActaStim Sync |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (38 ratings)](https://appshunter.io/ios/app/whatzit/id1133396295/reviews)** | [4.0 (27 ratings)](https://appshunter.io/ios/app/actastim-sync/id1519311246/reviews) |
| Number of ratings | **38** | 27 |
| Positive reviews | **81.8% of reviews** | 50.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 3 weeks** |
| Monetization | Free with in-app purchases | **Free** |
| Best chart rank | **#44** | — |
| Size | 33 MB | 23 MB |
| Requires iOS | **14.0** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [Essential Ventures LLC](https://appshunter.io/developer/1133396294) | [Theragen Inc](https://appshunter.io/developer/1519311248) |

## What reviewers say

### Whatzit

[App page](https://appshunter.io/ios/app/whatzit/id1133396295)

**Currently charting:** #44 Top Grossing · Medical (US App Store)

This secure platform aids in spine implant identification by allowing users to post X-rays for crowdsourced feedback. It utilizes proprietary AI-powered redaction technology to automatically remove sensitive text from images directly on your device before sharing.

**Highlights:** Spine implant identification, Crowdsourced X-ray feedback, AI-powered auto-redaction, On-device data processing, Secure image sharing

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Upgrade to Premium | $29.99 | per month |
| Upgrade to Premium | $179.99 | per year |
| Boost Your Post | $14.99 | one-time |


### ActaStim Sync

[App page](https://appshunter.io/ios/app/actastim-sync/id1519311246)

This app helps users stay focused on their recovery by tracking therapy, activity, and pain levels. It records personal achievements and provides summary reports for doctors to assess progress. Use only under a doctor's care.

**Highlights:** Track therapy, activity, and pain levels, Record personal events and achievements, Provide summary reports to doctors, Offer clarity and perspective on healing, Encourage consistent treatment

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

**In-app purchases:** none


## Frequently asked questions

### Is Whatzit free?

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

### Is ActaStim Sync free?

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

### Which has better reviews, Whatzit or ActaStim Sync?

Whatzit is rated higher. Whatzit averages 4.7 out of 5 from 38 ratings, while ActaStim Sync averages 4.0 from 27 ratings.

### Do Whatzit or ActaStim Sync have ads?

Neither Whatzit nor ActaStim Sync shows ads.

### Which is updated more often, Whatzit or ActaStim Sync?

Whatzit ships an update every 6 weeks, and ActaStim Sync every 3 weeks. Most recently, Whatzit was updated on October 16, 2026 and ActaStim Sync on October 8, 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.*