# SmartCalc+ Science Calculator vs Drastic Calc

The clearest difference is in-app purchases: Drastic Calc at none against SmartCalc+ Science Calculator's 2. Drastic Calc also leads on update cadence (weekly vs every 5 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. SmartCalc+ Science Calculator sells 2 in-app purchases, starting at $0.99 per 7 days. Drastic Calc asks for nothing beyond the download.

SmartCalc+ Science Calculator ships an update every 5 weeks, Drastic Calc weekly. The most recent releases landed on October 24, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | SmartCalc+ Science Calculator | Drastic Calc |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | Every 5 weeks | **Weekly** |
| Size | 9 MB | 15 MB |
| Requires iOS | **16.6** | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 9+ |
| Developer | [Retenica SP Z.O.O](https://appshunter.io/developer/1715674718) | [Tatsuro Furuya](https://appshunter.io/developer/1865297357) |

## What reviewers say

### SmartCalc+ Science Calculator

[App page](https://appshunter.io/ios/app/smartcalc-plus-science-calculator/id6483847331)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Premium Access | $0.99 | per 7 days |
| Annual Premium Access | $9.99 | per year |


### Drastic Calc

[App page](https://appshunter.io/ios/app/drastic-calc/id6757259289)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is SmartCalc+ Science Calculator free?

SmartCalc+ Science Calculator is free to download, with in-app purchases available.

### Is Drastic Calc free?

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

### Do SmartCalc+ Science Calculator or Drastic Calc have ads?

Both SmartCalc+ Science Calculator and Drastic Calc show ads.

### Which is updated more often, SmartCalc+ Science Calculator or Drastic Calc?

SmartCalc+ Science Calculator ships an update every 5 weeks, and Drastic Calc weekly. Most recently, SmartCalc+ Science Calculator was updated on October 24, 2026 and Drastic Calc 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.*