# 틈틈잇 vs 날벼락

The clearest difference is update cadence: 날벼락 at every 3 days against 틈틈잇's weekly. 날벼락 also leads on device support (3 vs 1) and iOS requirement (15.1 vs 18.0). On price, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

틈틈잇 ships an update weekly, 날벼락 every 3 days. The most recent releases landed on October 31, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | 틈틈잇 | 날벼락 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 91.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Weekly | **Every 3 days** |
| Monetization | Free | — |
| Size | 29 MB | 52 MB |
| Requires iOS | 18.0 | **15.1** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [JaeHyeon Lim](https://appshunter.io/developer/1680730749) | [eunhyeok yang](https://appshunter.io/developer/6795759066) |

## What reviewers say

### 틈틈잇

[App page](https://appshunter.io/ios/app/ai/id6757255726)

Transform idle moments into productive learning with personalized AI-generated quizzes. Daily "knowledge snacks" are delivered to your home screen, offering a fun, 5-minute way to absorb and test new information. Stay motivated with smart reminders and visual progress tracking.

**Highlights:** AI-generated personalized quizzes, Daily "knowledge snacks" on home screen, 5-minute learning sessions, Smart reminders for learning routines, Visual progress tracking and rewards, Revisit completed quizzes

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

**In-app purchases:** none


### 날벼락

[App page](https://appshunter.io/ios/app/id6795970069)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 틈틈잇 free?

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

### Is 날벼락 free?

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

### Do 틈틈잇 or 날벼락 have ads?

Neither 틈틈잇 nor 날벼락 shows ads.

### Which is updated more often, 틈틈잇 or 날벼락?

틈틈잇 ships an update weekly, and 날벼락 every 3 days. Most recently, 틈틈잇 was updated on October 31, 2026 and 날벼락 on October 25, 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.*