# 66 Days vs enough.

The clearest difference is in-app purchases: enough. at none against 66 Days's 5. enough. also leads on update cadence (daily vs every 3 weeks) and iOS requirement (16.4 vs 18.0). 66 Days's advantage is device support (3 vs 1). On price and ads there is nothing between them.

Both are free to download. 66 Days sells 5 in-app purchases, starting at $1.99 per month. enough. asks for nothing beyond the download.

66 Days ships an update every 3 weeks, enough. daily. The most recent releases landed on November 2, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | 66 Days | enough. |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.1 (9 ratings)](https://appshunter.io/ios/app/66-days-habit-tracker/id1439590647/reviews)** | — |
| Number of ratings | **9** | — |
| Positive reviews | 72.9% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Daily** |
| Monetization | Freemium | — |
| Size | 19 MB | 49 MB |
| Requires iOS | 18.0 | **16.4** |
| Devices | **iPhone, iPad, Apple Watch** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Epipherse](https://appshunter.io/developer/1231938524) | [Hyeryung Choi](https://appshunter.io/developer/6811577987) |

## What reviewers say

### 66 Days

[App page](https://appshunter.io/ios/app/66-days-habit-tracker/id1439590647)

This app helps you build lasting habits by encouraging daily repetition over a 66-day period. Set project-specific goals and track your progress with features like memos, photos, and notifications.

**Highlights:** 66-day habit building system, Project-based goal setting, Daily progress tracking, Memo and photo recording, Dark mode support, Push notifications

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium 1 Month | $1.99 | per month |
| Premium 3 Month | $4.99 | per 3 months |
| Premium 1 Year | $9.99 | per year |
| Project Streak Recovery | $2.99 | one-time |
| Premium Lifetime | $22.99 | one-time |


### enough.

[App page](https://appshunter.io/ios/app/enough/id6811577745)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 66 Days free?

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

### Is enough. free?

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

### Do 66 Days or enough. have ads?

Neither 66 Days nor enough. shows ads.

### Which is updated more often, 66 Days or enough.?

66 Days ships an update every 3 weeks, and enough. daily. Most recently, 66 Days was updated on November 2, 2026 and enough. on October 31, 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.*