# YPT vs Sudoku

The clearest difference is rating: YPT at 4.7 against Sudoku's 4.1. YPT also leads on monetization model (free with in-app purchases vs subscription) and update cadence (every 2 days vs monthly). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. YPT sells 6 in-app purchases, starting at $2.99 per month and Sudoku sells 10 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

YPT holds the better App Store score, 4.7 against 4.1. Both are backed by a comparable volume of ratings — 1.8K and 4.3K respectively. Written reviews point the same way: 56% of YPT's written reviews are positive against 47% of Sudoku's.

YPT ships an update every 2 days, Sudoku monthly. Both last shipped on November 12, 2026.

## The numbers

| Metric | YPT | Sudoku |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (1.8K ratings)](https://appshunter.io/ios/app/ypt-study-group/id1441909643/reviews)** | [4.1 (4.3K ratings)](https://appshunter.io/ios/app/sudoku-no-ads/id1533935003/reviews) |
| Number of ratings | 1.8K | **4.3K** |
| Positive reviews | **55.9% of reviews** | 46.6% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 2 days** | Monthly |
| Monetization | **Free with in-app purchases** | Subscription |
| Size | 269 MB | 16 MB |
| Requires iOS | **15.0** | 15.6 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [UnCheon Baek](https://appshunter.io/developer/1143037815) | [Beijing Free Calculator Technology Co., Ltd.](https://appshunter.io/developer/1457813265) |

## What reviewers say

### YPT

[App page](https://appshunter.io/ios/app/ypt-study-group/id1441909643)

This app helps users study together remotely by tracking study time, planning daily tasks, and creating study groups. It offers real-time rankings and visualizes study progress to keep users motivated.

**Highlights:** Study time tracking, Daily planner and to-do lists, Remote study groups, Real-time ranking, Visual study statistics, Background noise options

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly subscription | $2.99 | per month |
| Monthly Premium | $4.99 | per month |
| Yearly Premium | $29.99 | per year |
| 100 flames | $0.99 | one-time |
| Unlock Apps | $0.99 | one-time |
| 600 flames | $3.99 | one-time |

**What reviewers like**

- 🚀 Motivating and competitive
- 👍 Comprehensive features (timer, planner, study groups)
- 🎨 Customizable themes and aesthetics
- 🔊 Helpful background noise options

**What reviewers complain about**

- 🐛 Bugs and glitches (freezing, crashing, time recording issues)
- ⏱️ Time zone issues for users outside of Korea
- 🔒 Restricted app access during study sessions

**Reported bugs**

- Timer not stopping when exiting the app
- Inconsistent time recording across devices
- Sudden language changes without user input
- Connectivity issues and server problems

**Requested features**

- Add ability to edit/remove specific study time entries
- Implement a desktop/web version of the app
- Allow more customization options for the calendar and planner
- Improve the allowed apps feature to work more reliably


### Sudoku

[App page](https://appshunter.io/ios/app/sudoku-no-ads/id1533935003)

Engage in a classic Sudoku experience with multiple difficulty levels suitable for all ages. Enjoy a clean interface, track your game history, and access unlimited solutions with a yearly subscription.

**Highlights:** Multiple difficulty levels, Beautiful and concise interface, Game history tracking, Unlimited Sudoku solutions, Ad-free experience

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Advanced features-1 month | $2.99 | per month |
| Advanced features-all year | $12.99 | per year |
| 数独高级会员-月 | $1.99 | one-time |
| 数独高级会员-年 | $9.99 | one-time |
| Sudoku Monthly Membership | $9.99 | one-time |
| Beginner Skill Course | $9.99 | one-time |
| Permanent Purchase | $14.99 | one-time |
| Sudoku Year Member | $29.99 | one-time |
| Sudoku Year Member | $49.99 | one-time |
| All Skill Courses | $59.99 | one-time |

**What reviewers like**

- 🚀 No ads
- 👍 Simple and straightforward
- 👍 Variety of difficulty levels
- 👍 Separate notes and final number inputs
- 👍 Good for practicing and improving skills

**What reviewers complain about**

- 🐛 Repeated puzzle layouts
- 🐛 Bugs and errors in puzzle generation
- 🔒 Requires payment to access basic features (sound, difficulty settings)
- 👎 Large gap in difficulty between easy and medium levels
- 👎 Inability to undo/reset a game in progress

**Reported bugs**

- Puzzles with no unique solution
- Game resets when app is closed
- Candidate numbers disappearing unexpectedly
- Incorrect highlighting of mistakes

**Requested features**

- Ability to select and mark multiple cells
- Option to view statistics and compare scores
- More granular difficulty settings between easy and hard
- Ability to save and resume an in-progress game
- Explanations for advanced solving techniques


## Frequently asked questions

### Is YPT free?

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

### Is Sudoku free?

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

### Which has better reviews, YPT or Sudoku?

YPT is rated higher. YPT averages 4.7 out of 5 from 1.8K ratings, while Sudoku averages 4.1 from 4.3K ratings.

### Do YPT or Sudoku have ads?

Neither YPT nor Sudoku shows ads.

### Which is updated more often, YPT or Sudoku?

YPT ships an update every 2 days, and Sudoku monthly. Most recently, YPT was updated on November 12, 2026 and Sudoku on November 12, 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.*