# sci.calculator vs Custom Real

The clearest difference is in-app purchases: Custom Real at none against sci.calculator's 1. Custom Real also leads on update cadence (every 3 days vs every 5 weeks). sci.calculator's advantage is ads (none vs shown). On price, device support and iOS requirement there is nothing between them.

Both are free to download. sci.calculator sells 1 one-off in-app purchase. Custom Real asks for nothing beyond the download.

sci.calculator ships an update every 5 weeks, Custom Real every 3 days. The most recent releases landed on October 16, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | sci.calculator | Custom Real |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 5 weeks | **Every 3 days** |
| Size | 49 MB | 5 MB |
| Requires iOS | 15.0 | **14.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Yukihiro Shioya](https://appshunter.io/developer/1565306192) | [kenta hamazaki](https://appshunter.io/developer/1589193489) |

## 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 |


### Custom Real

[App page](https://appshunter.io/ios/app/custom-real-time-calculator/id6449462897)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is sci.calculator free?

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

### Is Custom Real free?

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

### Do sci.calculator or Custom Real have ads?

Custom Real shows ads; sci.calculator does not.

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

sci.calculator ships an update every 5 weeks, and Custom Real every 3 days. Most recently, sci.calculator was updated on October 16, 2026 and Custom Real on October 15, 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.*