# GoodHabits vs Protocol66

The clearest difference is iOS requirement: Protocol66 at 18.0 against GoodHabits's 26.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. GoodHabits sells 1 one-off in-app purchase and Protocol66 sells 3 in-app purchases, starting at $2.99 per 7 days. Whichever you choose, the download price is not the number that matters.

GoodHabits ships an update every 4 weeks, Protocol66 every 2 weeks. The most recent releases landed on November 7, 2026 and November 9, 2026 respectively.

## The numbers

| Metric | GoodHabits | Protocol66 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 4 weeks | **Every 2 weeks** |
| Size | 15 MB | 35 MB |
| Requires iOS | 26.0 | **18.0** |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 12+ |
| Developer | [Simon Bogutzky](https://appshunter.io/developer/1594176396) | [Pocket Apps Studio Pte. Ltd.](https://appshunter.io/developer/1864339139) |

## What reviewers say

### GoodHabits

[App page](https://appshunter.io/ios/app/goodhabits-66-day-tracker/id1594176244)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Advanced Habit Tracking | $2.99 | one-time |


### Protocol66

[App page](https://appshunter.io/ios/app/protocol66/id6757076988)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Version | $2.99 | per 7 days |
| Pro | $19.99 | per year |
| Lifetime Access | $3.99 | one-time |


## Frequently asked questions

### Is GoodHabits free?

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

### Is Protocol66 free?

Protocol66 is free to download, with in-app purchases available.

### Do GoodHabits or Protocol66 have ads?

Neither GoodHabits nor Protocol66 shows ads.

### Which is updated more often, GoodHabits or Protocol66?

GoodHabits ships an update every 4 weeks, and Protocol66 every 2 weeks. Most recently, GoodHabits was updated on November 7, 2026 and Protocol66 on November 9, 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.*