# Simple Protein Log vs Smile Detection

The clearest difference is in-app purchases: Smile Detection at none against Simple Protein Log's 3. Simple Protein Log's advantage is device support (3 vs 1) and iOS requirement (13.0 vs 17.7.2). On price, update cadence and ads there is nothing between them.

Both are free to download. Simple Protein Log sells 3 in-app purchases, starting at $0.99 per month. Smile Detection asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 2 weeks. The most recent releases landed on October 14, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Simple Protein Log | Smile Detection |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | Every 2 weeks | Every 2 weeks |
| Size | 52 MB | 35 MB |
| Requires iOS | **13.0** | 17.7.2 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [NAOYA ONO](https://appshunter.io/developer/1530328146) | [Hideaki Uchikoshi](https://appshunter.io/developer/1559575002) |

## What reviewers say

### Simple Protein Log

[App page](https://appshunter.io/ios/app/simple-protein-log/id1669670482)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Plan | $0.99 | per month |
| Support Developer | $0.99 | one-time |
| Remove ads | $9.99 | one-time |


### Smile Detection

[App page](https://appshunter.io/ios/app/smile-detection/id6504737013)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Simple Protein Log free?

Simple Protein Log is free to download, with in-app purchases available.

### Is Smile Detection free?

Smile Detection is free to download, with no in-app purchases.

### Do Simple Protein Log or Smile Detection have ads?

Both Simple Protein Log and Smile Detection show ads.

### Which is updated more often, Simple Protein Log or Smile Detection?

Simple Protein Log ships an update every 2 weeks, and Smile Detection every 2 weeks. Most recently, Simple Protein Log was updated on October 14, 2026 and Smile Detection on October 3, 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.*