# Calta vs 電卓

The clearest difference is in-app purchases: Calta at none against 電卓's 3. Calta also leads on iOS requirement (11.0 vs 17.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. 電卓 sells 3 one-off in-app purchases. Calta asks for nothing beyond the download.

Calta ships an update every 3 days, 電卓 every 6 days. The most recent releases landed on October 29, 2026 and November 1, 2026 respectively.

## The numbers

| Metric | Calta | 電卓 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | **Every 3 days** | Every 6 days |
| Monetization | Ad-supported | — |
| Size | 23 MB | 8 MB |
| Requires iOS | **11.0** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Hiroki Oka](https://appshunter.io/developer/1464653539) | [Takahiro Kimura](https://appshunter.io/developer/6775796488) |

## 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

[App page](https://appshunter.io/ios/app/id6789199382)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Support the Developer | $0.99 | one-time |
| Remove Ads | $0.99 | one-time |
| Unlock More Styles | $1.99 | one-time |


## Frequently asked questions

### Is Calta free?

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

### Is 電卓 free?

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

### Do Calta or 電卓 have ads?

Both Calta and 電卓 show ads.

### Which is updated more often, Calta or 電卓?

Calta ships an update every 3 days, and 電卓 every 6 days. Most recently, Calta was updated on October 29, 2026 and 電卓 on November 1, 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.*