# Octuple Calc vs iBigCalc

The clearest difference is iOS requirement: Octuple Calc at 15.8.3 against iBigCalc's 17. On price, update cadence, ads and in-app purchases there is nothing between them.

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

Octuple Calc ships an update every 2 weeks, iBigCalc every 3 weeks. The most recent releases landed on October 13, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Octuple Calc | iBigCalc |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | **Every 2 weeks** | Every 3 weeks |
| Size | 36 MB | 5 MB |
| Requires iOS | **15.8.3** | 17 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Hideaki Uchikoshi](https://appshunter.io/developer/1559575002) | [Manh Phi Nguyen](https://appshunter.io/developer/1461707344) |

## What reviewers say

### Octuple Calc

[App page](https://appshunter.io/ios/app/octuple-calc/id6742039735)

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

**In-app purchases:** none


### iBigCalc

[App page](https://appshunter.io/ios/app/ibigcalc/id6760924865)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Octuple Calc free?

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

### Is iBigCalc free?

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

### Do Octuple Calc or iBigCalc have ads?

Both Octuple Calc and iBigCalc show ads.

### Which is updated more often, Octuple Calc or iBigCalc?

Octuple Calc ships an update every 2 weeks, and iBigCalc every 3 weeks. Most recently, Octuple Calc was updated on October 13, 2026 and iBigCalc on October 16, 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.*