# IsI Calculator vs CalBasic

The clearest difference is update cadence: IsI Calculator at fortnightly against CalBasic's every 22 months. IsI Calculator also leads on iOS requirement (9.0 vs 15.0). On price, ads, 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.

IsI Calculator ships an update fortnightly, CalBasic every 22 months. The most recent releases landed on November 6, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | IsI Calculator | CalBasic |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (3 ratings)](https://appshunter.io/ios/app/calbasic/id1636031976/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 22 months |
| Monetization | — | Free |
| Size | 15 MB | 1 MB |
| Requires iOS | **9.0** | 15.0 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Dominic Barra](https://appshunter.io/developer/891093115) | [Arun Mahasenan](https://appshunter.io/developer/1636031978) |

## What reviewers say

### IsI Calculator

[App page](https://appshunter.io/ios/app/isi-calculator/id891516315)

**Features:** macOS Compatibility

**In-app purchases:** none


### CalBasic

[App page](https://appshunter.io/ios/app/calbasic/id1636031976)

A straightforward calculator app designed for simplicity. It features color-coded buttons for easy identification and a clean interface. Ideal for quick calculations on your mobile device.

**Highlights:** Basic calculator functionality, Color-coded buttons, Simple and clean interface, Designed for quick calculations

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is IsI Calculator free?

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

### Is CalBasic free?

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

### Do IsI Calculator or CalBasic have ads?

Neither IsI Calculator nor CalBasic shows ads.

### Which is updated more often, IsI Calculator or CalBasic?

IsI Calculator ships an update fortnightly, and CalBasic every 22 months. Most recently, IsI Calculator was updated on November 6, 2026 and CalBasic on November 3, 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.*