# 리게인스터디(Regain Study) vs D.up(디.업)

The clearest difference is review sentiment: D.up(디.업) at 71% against 리게인스터디(Regain Study)'s 20%. D.up(디.업) also leads on update cadence (every 6 days vs every 3 months). 리게인스터디(Regain Study)'s advantage is ads (none vs shown) and monetization model (free vs ad-supported). On price, in-app purchases and device support there is nothing between them.

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

리게인스터디(Regain Study) ships an update every 3 months, D.up(디.업) every 6 days. The most recent releases landed on October 16, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | 리게인스터디(Regain Study) | D.up(디.업) |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 20.0% of reviews | **70.6% of reviews** |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 3 months | **Every 6 days** |
| Monetization | **Free** | Ad-supported |
| Size | 134 MB | 41 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Tobesmart,inc](https://appshunter.io/developer/1449538915) | [Daesung testing service co., ltd](https://appshunter.io/developer/596291691) |

## What reviewers say

### 리게인스터디(Regain Study)

[App page](https://appshunter.io/ios/app/regain-study/id1541105322)

This app offers premium services for members of a study cafe. Users can conveniently book and pay for seats, manage their passes, and extend their time all from their smartphone. It supports various payment methods for a seamless experience.

**Highlights:** Mobile seat booking, In-app payments, Multiple payment options, Pass management, Entry control, Time extension, Seat changes

**In-app purchases:** none


### D.up(디.업)

[App page](https://appshunter.io/ios/app/dup/id6755669416)

This app allows users to easily input answers from mock exams using their phone's camera for automatic recognition. It also provides cumulative score management, grade cut-off information, and mock exam schedule tracking for various national tests.

**Highlights:** OMR camera auto-recognition, Touch-based answer input, Cumulative score management, Grade cut-off verification, Mock exam schedule tracking

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

**In-app purchases:** none


## Frequently asked questions

### Is 리게인스터디(Regain Study) free?

리게인스터디(Regain Study) is free to download, with no in-app purchases.

### Is D.up(디.업) free?

D.up(디.업) is free to download, with no in-app purchases.

### Do 리게인스터디(Regain Study) or D.up(디.업) have ads?

D.up(디.업) shows ads; 리게인스터디(Regain Study) does not.

### Which is updated more often, 리게인스터디(Regain Study) or D.up(디.업)?

리게인스터디(Regain Study) ships an update every 3 months, and D.up(디.업) every 6 days. Most recently, 리게인스터디(Regain Study) was updated on October 16, 2026 and D.up(디.업) on October 28, 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.*