# 66 Days vs 들락 (Dlock)

The clearest difference is in-app purchases: 들락 (Dlock) at none against 66 Days's 5. 들락 (Dlock) also leads on update cadence (every 5 days vs every 3 weeks) and iOS requirement (12.0 vs 18.0). 66 Days's advantage is ads (none vs shown) and review sentiment (73% vs 38%). On price 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. 들락 (Dlock) asks for nothing beyond the download.

66 Days ships an update every 3 weeks, 들락 (Dlock) every 5 days. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | 66 Days | 들락 (Dlock) |
| --- | --- | --- |
| 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** | 38.5% of reviews |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 3 weeks | **Every 5 days** |
| Monetization | Freemium | **Free** |
| Size | 19 MB | 90 MB |
| Requires iOS | 18.0 | **12.0** |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Epipherse](https://appshunter.io/developer/1231938524) | [Seonhyo Kim](https://appshunter.io/developer/1724612424) |

## 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 |


### 들락 (Dlock)

[App page](https://appshunter.io/ios/app/dlock/id6475640224)

Start your day with 5 minutes of reading to combat dopamine addiction. AI scores your literacy daily and ranks you nationally. Begin your journey to a clearer mind today.

**Highlights:** 5-minute daily reading sessions, AI literacy scoring, National ranking, Dopamine addiction management, Clearer mind focus

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is 66 Days free?

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

### Is 들락 (Dlock) free?

들락 (Dlock) is free to download, with no in-app purchases.

### Do 66 Days or 들락 (Dlock) have ads?

들락 (Dlock) shows ads; 66 Days does not.

### Which is updated more often, 66 Days or 들락 (Dlock)?

66 Days ships an update every 3 weeks, and 들락 (Dlock) every 5 days. Most recently, 66 Days was updated on October 25, 2026 and 들락 (Dlock) on October 24, 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.*