# kuStudy vs BOOMBACK 붐백

The clearest difference is in-app purchases: BOOMBACK 붐백 at none against kuStudy's 10. BOOMBACK 붐백 also leads on update cadence (every 9 days vs every 4 weeks). kuStudy's advantage is device support (4 vs 2). On price, ads and iOS requirement there is nothing between them.

Both are free to download. kuStudy sells 10 in-app purchases, starting at $2.99 per 7 days. BOOMBACK 붐백 asks for nothing beyond the download.

kuStudy ships an update every 4 weeks, BOOMBACK 붐백 every 9 days. The most recent releases landed on November 1, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | kuStudy | BOOMBACK 붐백 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (7 ratings)](https://appshunter.io/ios/app/kustudy/id925255895/reviews)** | — |
| Number of ratings | **7** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 weeks | **Every 9 days** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 4 MB | 3 MB |
| Requires iOS | 16.0 | **15.0** |
| Devices | **iPhone, iPad, Apple Watch, Vision Pro** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Bummo.Dev](https://appshunter.io/developer/918897632) | [JEONGDAE PARK](https://appshunter.io/developer/6776103935) |

## What reviewers say

### kuStudy

[App page](https://appshunter.io/ios/app/kustudy/id925255895)

Find available study spaces and empty seats in university libraries in real-time. Access information quickly through widgets on your phone, watch, or even spatial computing devices. Seamlessly share status updates and navigate without interrupting your workflow.

**Highlights:** Real-time seat availability, Home screen and lock screen widgets, Apple Watch complications, Handoff support across devices, Split View and Slide Over for iPad, Spatial computing vision support

**Features:** macOS Compatibility, Apple Watch app

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Subscription | $2.99 | per 7 days |
| Monthly Subscription | $4.99 | per month |
| Quarterly Subscription | $9.99 | per 3 months |
| Semiannual Subscription | $12.99 | per 6 months |
| Yearly Subscription | $14.99 | per year |
| Gratitude | $0.99 | one-time |
| Chocolate | $1.99 | one-time |
| Coffee | $2.99 | one-time |
| Lunch | $4.99 | one-time |
| Special Thanks | $8.99 | one-time |


### BOOMBACK 붐백

[App page](https://appshunter.io/ios/app/boomback/id6776103933)

This service assists MapleStory players with equipment enhancement (Star Force). Submit your enhancement requests, and monitor the progress and outcomes in real-time through the app. It offers 24-hour focused enhancement with guaranteed success to your target level.

**Highlights:** Equipment enhancement requests, Real-time progress and result tracking, 24-hour focused enhancement, Guaranteed success to target level, Transparent cost estimates, 1:1 communication with blacksmith

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

**In-app purchases:** none


## Frequently asked questions

### Is kuStudy free?

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

### Is BOOMBACK 붐백 free?

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

### Do kuStudy or BOOMBACK 붐백 have ads?

Neither kuStudy nor BOOMBACK 붐백 shows ads.

### Which is updated more often, kuStudy or BOOMBACK 붐백?

kuStudy ships an update every 4 weeks, and BOOMBACK 붐백 every 9 days. Most recently, kuStudy was updated on November 1, 2026 and BOOMBACK 붐백 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.*