# sci.calculator vs Relis Plus

The clearest difference is in-app purchases: Relis Plus at none against sci.calculator's 1. On price, update cadence, ads and device support there is nothing between them.

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

Both ship on a similar rhythm, roughly every 5 weeks. The most recent releases landed on November 7, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | sci.calculator | Relis Plus |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 5 weeks | Every 5 weeks |
| Size | 49 MB | 59 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Yukihiro Shioya](https://appshunter.io/developer/1565306192) | [Kenta Tanaka](https://appshunter.io/developer/1499597894) |

## 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 |


### Relis Plus

[App page](https://appshunter.io/ios/app/relis-plus/id6753906585)

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

**In-app purchases:** none


## Frequently asked questions

### Is sci.calculator free?

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

### Is Relis Plus free?

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

### Do sci.calculator or Relis Plus have ads?

Neither sci.calculator nor Relis Plus shows ads.

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

sci.calculator ships an update every 5 weeks, and Relis Plus every 5 weeks. Most recently, sci.calculator was updated on November 7, 2026 and Relis Plus on November 5, 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.*