# 税理Pro vs Sum

The clearest difference is in-app purchases: Sum at none against 税理Pro's 2. 税理Pro's advantage is update cadence (every 6 weeks vs every 31 months). On price, rating, ratings volume and ads there is nothing between them.

Both are free to download. 税理Pro sells 2 in-app purchases, starting at $5.49 per month. Sum asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 3.0 for 税理Pro against 3.0 for Sum. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

税理Pro ships an update every 6 weeks, Sum every 31 months. The most recent releases landed on September 21, 2026 and July 4, 2026 respectively.

## The numbers

| Metric | 税理Pro | Sum |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (1 ratings)](https://appshunter.io/ios/app/pro/id353875869/reviews) | [3.0 (1 ratings)](https://appshunter.io/ios/app/sum-rise/id1263772041/reviews) |
| Number of ratings | 1 | 1 |
| Positive reviews | 25.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 31 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 5 MB | 9 MB |
| Requires iOS | **14.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [System Approach](https://appshunter.io/developer/347519116) | [KACHIEL INC.](https://appshunter.io/developer/1263772040) |

## What reviewers say

### 税理Pro

[App page](https://appshunter.io/ios/app/pro/id353875869)

This professional tax calculator offers comprehensive tax computations for individuals and corporations. It includes features for income tax, corporate tax, property taxes, and more, with simulation and result export capabilities. A free version with limited functionality is available, with full access unlocked via subscription.

**Highlights:** Comprehensive tax calculations, Income and corporate tax, Property and transaction taxes, Simulation and検算, Email results, Save and edit calculations, Resume interrupted calculations

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 制限解除プラン | $5.49 | per month |
| 制限解除プラン | $52.99 | per year |


### Sum

[App page](https://appshunter.io/ios/app/sum-rise/id1263772041)

This app provides tax accountants with essential tools and daily curated articles on legal precedents and tax reforms. It includes quick calculation tables, tax rate information, and a calendar for filing deadlines, all accessible for free.

**Highlights:** Daily curated tax and legal articles, Quick calculation tables, Tax rate information, Filing and payment deadline calendar, Google Calendar sync, Contact information for tax offices

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 税理Pro free?

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

### Is Sum free?

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

### Which has better reviews, 税理Pro or Sum?

税理Pro and Sum are both rated 3.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do 税理Pro or Sum have ads?

Neither 税理Pro nor Sum shows ads.

### Which is updated more often, 税理Pro or Sum?

税理Pro ships an update every 6 weeks, and Sum every 31 months. Most recently, 税理Pro was updated on September 21, 2026 and Sum on July 4, 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.*