# Calculator with 13 button vs eCalc

The clearest difference is ads: eCalc at none against Calculator with 13 button's shown. eCalc also leads on update cadence (every 2 days vs every 2 months) and iOS requirement (17.6 vs 26.0). 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.

Calculator with 13 button ships an update every 2 months, eCalc every 2 days. The most recent releases landed on October 14, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Calculator with 13 button | eCalc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/calculator-with-13-button/id6754880197/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Every 2 days** |
| Monetization | Ad-supported | — |
| Size | 42 MB | 2 MB |
| Requires iOS | 26.0 | **17.6** |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Hideaki Uchikoshi](https://appshunter.io/developer/1559575002) | [Quynh Dinh Huu](https://appshunter.io/developer/1140053429) |

## What reviewers say

### Calculator with 13 button

[App page](https://appshunter.io/ios/app/calculator-with-13-button/id6754880197)

This utility app provides a basic calculator with a unique 13-button layout for quick input. It is designed for iPhone users seeking a straightforward calculation tool.

**Highlights:** 13-button layout, Fast typing, Basic calculations, iPhone compatible

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

**In-app purchases:** none


### eCalc

[App page](https://appshunter.io/ios/app/ecalc-easy-calculator/id6787689502)

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

**In-app purchases:** none


## Frequently asked questions

### Is Calculator with 13 button free?

Calculator with 13 button is free to download, with no in-app purchases.

### Is eCalc free?

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

### Do Calculator with 13 button or eCalc have ads?

Calculator with 13 button shows ads; eCalc does not.

### Which is updated more often, Calculator with 13 button or eCalc?

Calculator with 13 button ships an update every 2 months, and eCalc every 2 days. Most recently, Calculator with 13 button was updated on October 14, 2026 and eCalc 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.*