# Calta vs 電卓：履歴が残る・式が見える計算機

The clearest difference is in-app purchases: Calta at none against 電卓：履歴が残る・式が見える計算機's 1. Calta also leads on update cadence (every 3 days vs every 2 weeks) and iOS requirement (11.0 vs 15.1). On price, ads and device support there is nothing between them.

Both are free to download. 電卓：履歴が残る・式が見える計算機 sells 1 one-off in-app purchase. Calta asks for nothing beyond the download.

Calta ships an update every 3 days, 電卓：履歴が残る・式が見える計算機 every 2 weeks. The most recent releases landed on October 6, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Calta | 電卓：履歴が残る・式が見える計算機 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | **Every 3 days** | Every 2 weeks |
| Monetization | Ad-supported | — |
| Size | 23 MB | 31 MB |
| Requires iOS | **11.0** | 15.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Hiroki Oka](https://appshunter.io/developer/1464653539) | [Miyuki Fujirai](https://appshunter.io/developer/1838371790) |

## What reviewers say

### Calta

[App page](https://appshunter.io/ios/app/calta/id1499265833)

This calculator app offers advanced features like equation display, calculation history, and redo/undo functionality for easier use. Customize backgrounds and button shapes, and perform tax calculations with adjustable rates. It supports up to 20 digits and respects order of operations.

**Highlights:** Equation display, Calculation history, Redo and Undo functions, Customizable background, Customizable button shape, Tax calculation, Order of operations support

**Features:** macOS Compatibility

**In-app purchases:** none


### 電卓：履歴が残る・式が見える計算機

[App page](https://appshunter.io/ios/app/id6757992389)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $2.99 | one-time |


## Frequently asked questions

### Is Calta free?

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

### Is 電卓：履歴が残る・式が見える計算機 free?

電卓：履歴が残る・式が見える計算機 is free to download, with in-app purchases available.

### Do Calta or 電卓：履歴が残る・式が見える計算機 have ads?

Both Calta and 電卓：履歴が残る・式が見える計算機 show ads.

### Which is updated more often, Calta or 電卓：履歴が残る・式が見える計算機?

Calta ships an update every 3 days, and 電卓：履歴が残る・式が見える計算機 every 2 weeks. Most recently, Calta was updated on October 6, 2026 and 電卓：履歴が残る・式が見える計算機 on October 25, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*