# Sum vs 源泉徴収係長R

The clearest difference is in-app purchases: Sum at none against 源泉徴収係長R's 1. 源泉徴収係長R's advantage is update cadence (every 9 months vs every 31 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. 源泉徴収係長R sells 1 in-app purchase, starting at $2.49 per 3 months. Sum asks for nothing beyond the download.

Sum ships an update every 31 months, 源泉徴収係長R every 9 months. The most recent releases landed on October 14, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Sum | 源泉徴収係長R |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (1 ratings)](https://appshunter.io/ios/app/sum-rise/id1263772041/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 31 months | **Every 9 months** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 9 MB | 2 MB |
| Requires iOS | 15.6 | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [KACHIEL INC.](https://appshunter.io/developer/1263772040) | [Ho't unite](https://appshunter.io/developer/486153744) |

## What reviewers say

### 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


### 源泉徴収係長R

[App page](https://appshunter.io/ios/app/r/id1522187059)

Calculate various withholding tax amounts easily, including salary, bonuses, and various fees. Offers reverse calculation from net pay and handles consumption tax for fees. Supports retirement income tax calculations.

**Highlights:** Salary and bonus tax calculation, Various fee tax calculation, Reverse calculation from net pay, Consumption tax calculation for fees, Retirement income tax calculation, Dividend and interest tax calculation

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 有料全機能オプション | $2.49 | per 3 months |


## Frequently asked questions

### Is Sum free?

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

### Is 源泉徴収係長R free?

源泉徴収係長R is free to download, with in-app purchases available.

### Do Sum or 源泉徴収係長R have ads?

Neither Sum nor 源泉徴収係長R shows ads.

### Which is updated more often, Sum or 源泉徴収係長R?

Sum ships an update every 31 months, and 源泉徴収係長R every 9 months. Most recently, Sum was updated on October 14, 2026 and 源泉徴収係長R on October 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.*