# Salt Studios vs Formula Sift

The clearest difference is in-app purchases: Salt Studios at none against Formula Sift's 3. Salt Studios also leads on device support (3 vs 1) and iOS requirement (14.0 vs 18.0). Formula Sift's advantage is ads (none vs shown) and update cadence (every 5 days vs every 3 months). On price there is nothing between them.

Both are free to download. Formula Sift sells 3 in-app purchases, starting at $2.99 per month. Salt Studios asks for nothing beyond the download.

Salt Studios ships an update every 3 months, Formula Sift every 5 days. The most recent releases landed on September 16, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | Salt Studios | Formula Sift |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 3 months | **Every 5 days** |
| Size | 126 MB | 7 MB |
| Requires iOS | **14.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Salt Studios LLC](https://appshunter.io/developer/1853538391) | [占辉 百](https://appshunter.io/developer/1081455103) |

## 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


### Formula Sift

[App page](https://appshunter.io/ios/app/formula-sift-ingredient-check/id6766007677)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Premium Membership | $2.99 | per month |
| Yearly Premium Membership | $9.99 | per year |
| Lifetime Premium | $17.99 | one-time |


## Frequently asked questions

### Is Salt Studios free?

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

### Is Formula Sift free?

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

### Do Salt Studios or Formula Sift have ads?

Salt Studios shows ads; Formula Sift does not.

### Which is updated more often, Salt Studios or Formula Sift?

Salt Studios ships an update every 3 months, and Formula Sift every 5 days. Most recently, Salt Studios was updated on September 16, 2026 and Formula Sift on October 20, 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.*