# O`haitai vs BasicCalc

The clearest difference is update cadence: O`haitai at every 5 weeks against BasicCalc's every 17 months. O`haitai also leads on iOS requirement (8.0 vs 15.6). 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.

O`haitai ships an update every 5 weeks, BasicCalc every 17 months. The most recent releases landed on October 11, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | O`haitai | BasicCalc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/basiccalc-scientific-and-easy/id6743786074/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 17 months |
| Monetization | — | Free |
| Size | 16 MB | 11 MB |
| Requires iOS | **8.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [志强 童](https://appshunter.io/developer/1214909933) | [Rodrigo Belloso](https://appshunter.io/developer/1361382340) |

## What reviewers say

### O`haitai

[App page](https://appshunter.io/ios/app/ohaitai/id1481321273)

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

**In-app purchases:** none


### BasicCalc

[App page](https://appshunter.io/ios/app/basiccalc-scientific-and-easy/id6743786074)

This app offers both basic and advanced scientific calculation modes with a clean interface and large buttons. It features a persistent history of your last 30 operations and works offline on your iPhone or iPad.

**Highlights:** Basic and Scientific calculation modes, Large, easy-to-tap buttons, Persistent calculation history (last 30 ops), Works offline, Dark theme option, Supports iPhone and iPad

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

**In-app purchases:** none


## Frequently asked questions

### Is O`haitai free?

O`haitai is free to download, with no in-app purchases.

### Is BasicCalc free?

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

### Do O`haitai or BasicCalc have ads?

Neither O`haitai nor BasicCalc shows ads.

### Which is updated more often, O`haitai or BasicCalc?

O`haitai ships an update every 5 weeks, and BasicCalc every 17 months. Most recently, O`haitai was updated on October 11, 2026 and BasicCalc 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.*