# Drift vs Calculator Sci Unit Converter

The clearest difference is price: Drift at Free against Calculator Sci Unit Converter's $1.99. Drift also leads on update cadence (weekly vs monthly). Calculator Sci Unit Converter's advantage is ads (none vs shown) and device support (3 vs 1). On in-app purchases there is nothing between them.

Drift is free to download; Calculator Sci Unit Converter costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Drift ships an update weekly, Calculator Sci Unit Converter monthly. Both last shipped on October 11, 2026.

## The numbers

| Metric | Drift | Calculator Sci Unit Converter |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | — | **[4.0 (2 ratings)](https://appshunter.io/ios/app/calculator-sci-unit-converter/id6772422667/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 66.7% of reviews |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Weekly** | Monthly |
| Monetization | — | Paid |
| Size | 11 MB | 25 MB |
| Requires iOS | 17.6 | **13.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Shih-Kung Chen](https://appshunter.io/developer/871339068) | [Xiamen City Fanyou Network Technology Co., Ltd.](https://appshunter.io/developer/1842524161) |

## What reviewers say

### Drift

[App page](https://appshunter.io/ios/app/drift-secrets-in-code/id6753609055)

**In-app purchases:** none


### Calculator Sci Unit Converter

[App page](https://appshunter.io/ios/app/calculator-sci-unit-converter/id6772422667)

This app offers a robust calculator with both standard and scientific functions. It includes a unit converter for various measurements and currency, plus helpful shortcuts for percentages, taxes, and tips. All calculations are saved locally for easy access.

**Highlights:** Standard and scientific calculator modes, Unit conversion for length, weight, temperature, currency, Full calculation history log, Percentage, tax, and tip calculation shortcuts, Offline functionality, Optimized for phone and tablet

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

**In-app purchases:** none


## Frequently asked questions

### Is Drift free?

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

### Is Calculator Sci Unit Converter free?

Calculator Sci Unit Converter costs $1.99, with no in-app purchases.

### Do Drift or Calculator Sci Unit Converter have ads?

Drift shows ads; Calculator Sci Unit Converter does not.

### Which is updated more often, Drift or Calculator Sci Unit Converter?

Drift ships an update weekly, and Calculator Sci Unit Converter monthly. Most recently, Drift was updated on October 11, 2026 and Calculator Sci Unit Converter on October 11, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*