# Pythagoras vs 51论文查重

The clearest difference is rating: 51论文查重 at 5.0 against Pythagoras's 2.0. 51论文查重 also leads on update cadence (fortnightly vs every 6 months). Pythagoras's advantage is in-app purchases (none vs 10) and iOS requirement (8.0 vs 11.0). On price, ratings volume, ads and device support there is nothing between them.

Both are free to download. 51论文查重 sells 10 one-off in-app purchases. Pythagoras asks for nothing beyond the download.

51论文查重 holds the better App Store score, 5.0 against 2.0. Both are backed by a comparable volume of ratings — 1 and 2 respectively.

Pythagoras ships an update every 6 months, 51论文查重 fortnightly. The most recent releases landed on September 25, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | Pythagoras | 51论文查重 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.0 (1 ratings)](https://appshunter.io/ios/app/pythagoras/id404430950/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/51/id1497273923/reviews)** |
| Number of ratings | 1 | **2** |
| Positive reviews | 35.2% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 months | **Fortnightly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 8 MB | 25 MB |
| Requires iOS | **8.0** | 11.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Roman Koksharov](https://appshunter.io/developer/700716922) | [Beijing Jiangao Technology Co., Ltd.](https://appshunter.io/developer/1497273922) |

## What reviewers say

### Pythagoras

[App page](https://appshunter.io/ios/app/pythagoras/id404430950)

Explore the Pythagorean Theorem through engaging puzzles without complex formulas. This educational app offers a beautiful and fascinating way to understand geometric principles.

**Highlights:** Visual proof of Pythagorean Theorem, Formula-free learning, Educational puzzle gameplay, Beautiful design, Engaging and fascinating

**Features:** macOS Compatibility

**In-app purchases:** none


### 51论文查重

[App page](https://appshunter.io/ios/app/51/id1497273923)

This app helps students and academics check their papers for plagiarism. It offers fast and accurate detection against a vast database, assisting with revisions to improve acceptance rates for various academic works.

**Highlights:** Plagiarism detection, Paper revision assistance, Extensive comparison database, Fast and accurate results, Supports various academic paper types, Improves paper acceptance rates

**Features:** macOS Compatibility

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 论文查重12元/篇 | $1.99 | one-time |
| 论文降重93元 | $13.99 | one-time |
| 论文降重98元 | $14.99 | one-time |
| 论文降重108元 | $15.99 | one-time |
| 论文降重113元 | $16.99 | one-time |
| 论文降重118元 | $17.99 | one-time |
| 论文降重123元 | $18.99 | one-time |
| 论文降重128元 | $19.99 | one-time |
| 论文降重138元 | $20.99 | one-time |
| 论文降重148元 | $21.99 | one-time |


## Frequently asked questions

### Is Pythagoras free?

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

### Is 51论文查重 free?

51论文查重 is free to download, with in-app purchases available.

### Which has better reviews, Pythagoras or 51论文查重?

51论文查重 is rated higher. Pythagoras averages 2.0 out of 5 from 1 ratings, while 51论文查重 averages 5.0 from 2 ratings.

### Do Pythagoras or 51论文查重 have ads?

Neither Pythagoras nor 51论文查重 shows ads.

### Which is updated more often, Pythagoras or 51论文查重?

Pythagoras ships an update every 6 months, and 51论文查重 fortnightly. Most recently, Pythagoras was updated on September 25, 2026 and 51论文查重 on September 8, 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.*