# Re vs Protocol

The clearest difference is ads: Re at none against Protocol's shown. Re also leads on update cadence (every 5 days vs fortnightly). Protocol's advantage is iOS requirement (16.0 vs 26.2). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Re sells 3 in-app purchases, starting at $1.99 per month and Protocol sells 2 in-app purchases, starting at $14.99 per month. Whichever you choose, the download price is not the number that matters.

Re ships an update every 5 days, Protocol fortnightly. The most recent releases landed on September 9, 2026 and September 11, 2026 respectively.

## The numbers

| Metric | Re | Protocol |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.0 (2 ratings)](https://appshunter.io/ios/app/protocol-hrv-tracker/id6762954264/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 5 days** | Fortnightly |
| Monetization | — | Free with in-app purchases |
| Size | 83 MB | 58 MB |
| Requires iOS | 26.2 | **16.0** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 17+ | 17+ |
| Developer | [Rokas Kucinskas](https://appshunter.io/developer/1873578710) | [AppEcho Labs ,LLC](https://appshunter.io/developer/1701185869) |

## What reviewers say

### Re

[App page](https://appshunter.io/ios/app/restock-supplement-tracker/id6761713655)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ReStock Premium (Monthly) | $1.99 | per month |
| ReStock Premium (Yearly) | $17.99 | per year |
| ReStock Premium (Lifetime) | $24.99 | one-time |


### Protocol

[App page](https://appshunter.io/ios/app/protocol-hrv-tracker/id6762954264)

This app helps you scientifically test health claims about supplements, routines, and lifestyle changes. It guides you through 21-day experiments using your own body data and provides clear verdicts based on your metrics.

**Highlights:** Test health claims scientifically, Structured 21-day experiments, Integrates with Apple Health data, Provides clear 'Keep It' or 'Drop It' verdicts, Tests supplements, routines, and lifestyle changes, Data privacy and export options

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Protocol Pro (Monthly) | $14.99 | per month |
| Protocol Pro (Annual) | $119.99 | per year |


## Frequently asked questions

### Is Re free?

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

### Is Protocol free?

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

### Do Re or Protocol have ads?

Protocol shows ads; Re does not.

### Which is updated more often, Re or Protocol?

Re ships an update every 5 days, and Protocol fortnightly. Most recently, Re was updated on September 9, 2026 and Protocol on September 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.*