# 计算器 vs Pudding Scan

The clearest difference is review sentiment: Pudding Scan at 91% against 计算器's 35%. Pudding Scan also leads on ads (none vs shown) and rating (4.9 vs 4.7). 计算器's advantage is monetization model (free with in-app purchases vs subscription) and ratings volume (826 vs 211). On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. 计算器 sells 2 one-off in-app purchases and Pudding Scan sells 11 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

Pudding Scan holds the better App Store score, 4.9 against 4.7. Both are backed by a comparable volume of ratings — 826 and 211 respectively. Written reviews point the same way: 35% of 计算器's written reviews are positive against 91% of Pudding Scan's.

计算器 ships an update every 2 months, Pudding Scan every 5 weeks. Both last shipped on September 21, 2026.

## The numbers

| Metric | 计算器 | Pudding Scan |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (826 ratings)](https://appshunter.io/ios/app/id1265739545/reviews) | **[4.9 (211 ratings)](https://appshunter.io/ios/app/pudding-scan/id1626815079/reviews)** |
| Number of ratings | **826** | 211 |
| Positive reviews | 35.0% of reviews | **90.9% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Every 5 weeks** |
| Monetization | **Free with in-app purchases** | Subscription |
| Size | 110 MB | 146 MB |
| Requires iOS | 15.6 | **13** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [清龙 李](https://appshunter.io/developer/1226266031) | [广东天宸网络科技有限公司](https://appshunter.io/developer/1716282065) |

## What reviewers say

### 计算器

[App page](https://appshunter.io/ios/app/id1265739545)

This comprehensive calculator app offers a wide range of tools, including basic and scientific calculations, currency conversion, loan and tax calculators, and unit conversions. It simplifies complex calculations and conversions with an intuitive interface and voice input support.

**Highlights:** Basic and scientific calculator with voice input, Real-time currency conversion for over 160 countries, Loan calculator for commercial, provident fund, and combined loans, Tax calculator for salary, year-end bonuses, and labor remuneration, Date and unit conversion tools, Number system conversion (binary, octal, decimal, hexadecimal)

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 赞助去广告 | $3.99 | one-time |
| 赞助 | $14.99 | one-time |

**What reviewers like**

- 🚀 Efficient and fast
- 💡 Useful features
- 👍 Good user experience

**What reviewers complain about**

- 🐛 Bugs and glitches
- 🔍 Difficult to find ad close buttons
- 🔋 High ad frequency

**Reported bugs**

- Inaccurate real-time exchange rates
- Calculation errors for large numbers
- Sudden disappearance of split mode

**Requested features**

- Add option to disable ads for paid users
- Improve historical calculation record feature
- Add support for traditional Chinese language


### Pudding Scan

[App page](https://appshunter.io/ios/app/pudding-scan/id1626815079)

Transform paper documents into high-quality PDF files with a single tap. This ad-free scanner offers batch text extraction, translation, and automatic correction for various use cases, from students to teachers and personal learning.

**Highlights:** Scan paper documents to PDF, Batch image text extraction, Text translation, Automatic document correction, Accurate edge trimming, Multiple filter enhancements

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

**In-app purchases (11)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Auto-renewal monthly plan | $0.99 | per month |
| Auto-renewal monthly plan | $0.99 | per month |
| Monthly Subscription | $3.99 | per month |
| Monthly Subscription | $3.99 | per month |
| Annual Subscription | $9.99 | per year |
| Annual Subscription | $31.99 | per year |
| Annual Subscription | $31.99 | per year |
| 1-month membership | $1.99 | one-time |
| 布丁扫描会员(一年会员优惠) | $9.99 | one-time |
| 布丁扫描会员(一年会员) | $14.99 | one-time |
| Lifetime membership | $29.99 | one-time |


## Frequently asked questions

### Is 计算器 free?

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

### Is Pudding Scan free?

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

### Which has better reviews, 计算器 or Pudding Scan?

Pudding Scan is rated higher. 计算器 averages 4.7 out of 5 from 826 ratings, while Pudding Scan averages 4.9 from 211 ratings.

### Do 计算器 or Pudding Scan have ads?

计算器 shows ads; Pudding Scan does not.

### Which is updated more often, 计算器 or Pudding Scan?

计算器 ships an update every 2 months, and Pudding Scan every 5 weeks. Most recently, 计算器 was updated on September 21, 2026 and Pudding Scan on September 21, 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.*