# 税・割引計算機 vs Accumulate+ Compound Interest

The clearest difference is ads: 税・割引計算機 at none against Accumulate+ Compound Interest's shown. 税・割引計算機 also leads on iOS requirement (9.0 vs 16.0). Accumulate+ Compound Interest's advantage is update cadence (fortnightly vs every 21 months). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

税・割引計算機 ships an update every 21 months, Accumulate+ Compound Interest fortnightly. The most recent releases landed on October 15, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | 税・割引計算機 | Accumulate+ Compound Interest |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 21 months | **Fortnightly** |
| Size | 44 MB | 13 MB |
| Requires iOS | **9.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Kazuya Kobayashi](https://appshunter.io/developer/906985632) | [HIROSHI TANABE](https://appshunter.io/developer/1786283209) |

## What reviewers say

### 税・割引計算機

[App page](https://appshunter.io/ios/app/id1448116385)

**Features:** macOS Compatibility

**In-app purchases:** none


### Accumulate+ Compound Interest

[App page](https://appshunter.io/ios/app/accumulate-plus-compound-interest/id6752311892)

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

**In-app purchases:** none


## Frequently asked questions

### Is 税・割引計算機 free?

税・割引計算機 is free to download, with no in-app purchases.

### Is Accumulate+ Compound Interest free?

Accumulate+ Compound Interest is free to download, with no in-app purchases.

### Do 税・割引計算機 or Accumulate+ Compound Interest have ads?

Accumulate+ Compound Interest shows ads; 税・割引計算機 does not.

### Which is updated more often, 税・割引計算機 or Accumulate+ Compound Interest?

税・割引計算機 ships an update every 21 months, and Accumulate+ Compound Interest fortnightly. Most recently, 税・割引計算機 was updated on October 15, 2026 and Accumulate+ Compound Interest on October 28, 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.*