# sci.calculator vs HyoMemo

The clearest difference is ads: sci.calculator at none against HyoMemo's shown. sci.calculator also leads on iOS requirement (15.0 vs 17.0). HyoMemo's advantage is update cadence (every 4 days vs every 5 weeks). On price, in-app purchases and device support there is nothing between them.

Both are free to download. sci.calculator sells 1 one-off in-app purchase and HyoMemo sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

sci.calculator ships an update every 5 weeks, HyoMemo every 4 days. The most recent releases landed on September 30, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | sci.calculator | HyoMemo |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 5 weeks | **Every 4 days** |
| Size | 49 MB | 6 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Yukihiro Shioya](https://appshunter.io/developer/1565306192) | [Tatsuki Izumi](https://appshunter.io/developer/6808289732) |

## What reviewers say

### sci.calculator

[App page](https://appshunter.io/ios/app/scicalculator/id1620728508)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| remove Ads | $1.99 | one-time |


### HyoMemo

[App page](https://appshunter.io/ios/app/hyomemo-table-checklist/id6808516647)

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $1.99 | one-time |


## Frequently asked questions

### Is sci.calculator free?

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

### Is HyoMemo free?

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

### Do sci.calculator or HyoMemo have ads?

HyoMemo shows ads; sci.calculator does not.

### Which is updated more often, sci.calculator or HyoMemo?

sci.calculator ships an update every 5 weeks, and HyoMemo every 4 days. Most recently, sci.calculator was updated on September 30, 2026 and HyoMemo on October 13, 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.*