# 틈틈잇 vs 성인의 수학

The clearest difference is in-app purchases: 틈틈잇 at none against 성인의 수학's 2. 틈틈잇 also leads on ads (none vs shown). 성인의 수학's advantage is device support (3 vs 1) and iOS requirement (15.0 vs 18.0). On price and update cadence there is nothing between them.

Both are free to download. 성인의 수학 sells 2 one-off in-app purchases. 틈틈잇 asks for nothing beyond the download.

Both ship on a similar rhythm, roughly weekly. The most recent releases landed on October 10, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | 틈틈잇 | 성인의 수학 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 91.7% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Weekly | Weekly |
| Monetization | Free | — |
| Size | 29 MB | 48 MB |
| Requires iOS | 18.0 | **15.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [JaeHyeon Lim](https://appshunter.io/developer/1680730749) | [Mijin Kim](https://appshunter.io/developer/1717382242) |

## 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


### 성인의 수학

[App page](https://appshunter.io/ios/app/id6782822659)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 힌트쿠폰 10개 | $1.99 | one-time |
| 광고 제거 | $3.99 | one-time |


## Frequently asked questions

### Is 틈틈잇 free?

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

### Is 성인의 수학 free?

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

### Do 틈틈잇 or 성인의 수학 have ads?

성인의 수학 shows ads; 틈틈잇 does not.

### Which is updated more often, 틈틈잇 or 성인의 수학?

틈틈잇 ships an update weekly, and 성인의 수학 weekly. Most recently, 틈틈잇 was updated on October 10, 2026 and 성인의 수학 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.*