# e vs sci.calculator

The clearest difference is in-app purchases: e at none against sci.calculator's 1. e also leads on iOS requirement (6.1 vs 15.0). sci.calculator's advantage is update cadence (every 5 weeks vs every 5 months). On price, ads and device support there is nothing between them.

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

e ships an update every 5 months, sci.calculator every 5 weeks. The most recent releases landed on October 5, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | e | sci.calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (1 ratings)](https://appshunter.io/ios/app/e-calcfree/id591591892/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 55.6% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 5 weeks** |
| Monetization | Free | — |
| Size | 7 MB | 49 MB |
| Requires iOS | **6.1** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [e-skett Corp.](https://appshunter.io/developer/591591895) | [Yukihiro Shioya](https://appshunter.io/developer/1565306192) |

## What reviewers say

### e

[App page](https://appshunter.io/ios/app/e-calcfree/id591591892)

This scientific calculator supports engineering notation with prefixes like pico, nano, and mega. It offers a history feature to review past calculations and allows editing of formulas for recalculation. The free version has some limitations on history scrolling and saving.

**Highlights:** Scientific notation support, Engineering multipliers (p, n, u, m, k, M), History of past calculations, Editable formulas for recalculation, Unit conversion for engineering prefixes

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

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is e free?

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

### Is sci.calculator free?

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

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

Neither e nor sci.calculator shows ads.

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

e ships an update every 5 months, and sci.calculator every 5 weeks. Most recently, e was updated on October 5, 2026 and sci.calculator 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.*