# 66 Days vs COMPASS (콤파스)

The clearest difference is in-app purchases: COMPASS (콤파스) at none against 66 Days's 5. COMPASS (콤파스) also leads on iOS requirement (13.0 vs 18.0). On price, update cadence, ads and device support there is nothing between them.

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

66 Days ships an update every 3 weeks, COMPASS (콤파스) every 2 weeks. The most recent releases landed on October 25, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | 66 Days | COMPASS (콤파스) |
| --- | --- | --- |
| 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 | **Every 2 weeks** |
| Monetization | Freemium | — |
| Size | 19 MB | 36 MB |
| Requires iOS | 18.0 | **13.0** |
| Devices | **iPhone, iPad, Apple Watch** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Epipherse](https://appshunter.io/developer/1231938524) | [HDC Labs Co., Ltd.](https://appshunter.io/developer/952972781) |

## 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 |


### COMPASS (콤파스)

[App page](https://appshunter.io/ios/app/compass/id6446012750)

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


## Frequently asked questions

### Is 66 Days free?

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

### Is COMPASS (콤파스) free?

COMPASS (콤파스) is free to download, with no in-app purchases.

### Do 66 Days or COMPASS (콤파스) have ads?

Neither 66 Days nor COMPASS (콤파스) shows ads.

### Which is updated more often, 66 Days or COMPASS (콤파스)?

66 Days ships an update every 3 weeks, and COMPASS (콤파스) every 2 weeks. Most recently, 66 Days was updated on October 25, 2026 and COMPASS (콤파스) on October 30, 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.*