# Synstax vs Nutrient Deficiencies Checker

The clearest difference is in-app purchases: Nutrient Deficiencies Checker at none against Synstax's 3. Nutrient Deficiencies Checker also leads on update cadence (every 8 days vs every 3 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Synstax sells 3 in-app purchases, starting at $4.99 per month. Nutrient Deficiencies Checker asks for nothing beyond the download.

Synstax ships an update every 3 weeks, Nutrient Deficiencies Checker every 8 days. The most recent releases landed on October 24, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Synstax | Nutrient Deficiencies Checker |
| --- | --- | --- |
| 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 | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 8 days** |
| Monetization | Freemium | — |
| Size | 151 MB | 2 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone | iPhone |
| Age rating | 12+ | 17+ |
| Developer | [宁 丁](https://appshunter.io/developer/1848762948) | [Appkitekt Ltd.](https://appshunter.io/developer/1771314634) |

## What reviewers say

### 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 |


### Nutrient Deficiencies Checker

[App page](https://appshunter.io/ios/app/nutrient-deficiencies-checker/id6762244390)

**In-app purchases:** none


## Frequently asked questions

### Is Synstax free?

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

### Is Nutrient Deficiencies Checker free?

Nutrient Deficiencies Checker is free to download, with no in-app purchases.

### Do Synstax or Nutrient Deficiencies Checker have ads?

Neither Synstax nor Nutrient Deficiencies Checker shows ads.

### Which is updated more often, Synstax or Nutrient Deficiencies Checker?

Synstax ships an update every 3 weeks, and Nutrient Deficiencies Checker every 8 days. Most recently, Synstax was updated on October 24, 2026 and Nutrient Deficiencies Checker on October 10, 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.*