# Salt Studios vs Synthesis Tracker

The clearest difference is ads: Synthesis Tracker at none against Salt Studios's shown. Synthesis Tracker also leads on update cadence (weekly vs every 3 months). Salt Studios's advantage is iOS requirement (14.0 vs 16.4). On price, in-app purchases and device support there is nothing between them.

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

Salt Studios ships an update every 3 months, Synthesis Tracker weekly. The most recent releases landed on September 16, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | Salt Studios | Synthesis Tracker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (12 ratings)](https://appshunter.io/ios/app/synthesis-tracker/id6788431222/reviews)** |
| Number of ratings | — | **12** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 3 months | **Weekly** |
| Monetization | — | Free |
| Size | 126 MB | 58 MB |
| Requires iOS | **14.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [Salt Studios LLC](https://appshunter.io/developer/1853538391) | [Outliers Inc.](https://appshunter.io/developer/6788431224) |

## What reviewers say

### Salt Studios

[App page](https://appshunter.io/ios/app/salt-studios-us/id6755384916)

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


### Synthesis Tracker

[App page](https://appshunter.io/ios/app/synthesis-tracker/id6788431222)

This app allows parents to easily log their child's ADHD symptoms and daily progress using voice input. It analyzes these logs to identify patterns in mood, focus, and behavior, providing a clear report for healthcare providers.

**Highlights:** Voice logging for quick entries, Track doses, mood, sleep, focus, and appetite, Automatic pattern detection, Build trend reports, 7-day timeline review, Private by design with on-device transcription

**In-app purchases:** none


## Frequently asked questions

### Is Salt Studios free?

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

### Is Synthesis Tracker free?

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

### Do Salt Studios or Synthesis Tracker have ads?

Salt Studios shows ads; Synthesis Tracker does not.

### Which is updated more often, Salt Studios or Synthesis Tracker?

Salt Studios ships an update every 3 months, and Synthesis Tracker weekly. Most recently, Salt Studios was updated on September 16, 2026 and Synthesis Tracker on October 13, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*