# Vitamin Tracker vs Synstax

The clearest difference is ads: Synstax at none against Vitamin Tracker's shown. Synstax also leads on update cadence (every 3 weeks vs every 4 months). Vitamin Tracker's advantage is device support (3 vs 1) and iOS requirement (15.0 vs 17.0). On price and in-app purchases there is nothing between them.

Both are free to download. Vitamin Tracker sells 2 in-app purchases, starting at $4.99 per month and Synstax sells 3 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

Vitamin Tracker ships an update every 4 months, Synstax every 3 weeks. The most recent releases landed on October 18, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Vitamin Tracker | Synstax |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/synstax-interaction-checker/id6760453147/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 4 months | **Every 3 weeks** |
| Monetization | — | Freemium |
| Size | 78 MB | 152 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 12+ |
| Developer | [kota tada](https://appshunter.io/developer/1658942612) | [宁 丁](https://appshunter.io/developer/1848762948) |

## What reviewers say

### Vitamin Tracker

[App page](https://appshunter.io/ios/app/vitamin-tracker-supp-stack/id6759486455)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium (1 month) | $4.99 | per month |
| Premium (1 year) | $49.99 | per year |


### Synstax

[App page](https://appshunter.io/ios/app/synstax-interaction-checker/id6760453147)

This app helps you manage your supplement intake by checking for interactions between supplements and how your diet affects absorption. It features AI-powered label scanning, intake tracking, and personalized insights to optimize your routine.

**Highlights:** Supplement combination checker, Diet-supplement absorption insights, AI-powered label scanner, Smart intake tracking, AI analysis and chat, Personalized scheduling

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Synstax Pro | $4.99 | per month |
| Synstax Pro | $29.99 | per year |
| Synstax Pro Lifetime | $69.99 | one-time |


## Frequently asked questions

### Is Vitamin Tracker free?

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

### Is Synstax free?

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

### Do Vitamin Tracker or Synstax have ads?

Vitamin Tracker shows ads; Synstax does not.

### Which is updated more often, Vitamin Tracker or Synstax?

Vitamin Tracker ships an update every 4 months, and Synstax every 3 weeks. Most recently, Vitamin Tracker was updated on October 18, 2026 and Synstax on October 11, 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.*