# ExSciCalc vs Unit Eater

The clearest difference is price: Unit Eater at Free against ExSciCalc's $1.99. Unit Eater also leads on update cadence (every 2 weeks vs every 3 weeks) and device support (4 vs 2). ExSciCalc's advantage is in-app purchases (none vs 2). On review sentiment and ads there is nothing between them.

Unit Eater is free to download; ExSciCalc costs $1.99 up front. Unit Eater sells 2 in-app purchases, starting at $0.99 per month. ExSciCalc asks for nothing beyond the download.

ExSciCalc ships an update every 3 weeks, Unit Eater every 2 weeks. The most recent releases landed on June 5, 2026 and September 11, 2026 respectively.

## The numbers

| Metric | ExSciCalc | Unit Eater |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/exscicalc/id1625177287/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 2 weeks** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 1 MB | 65 MB |
| Requires iOS | 14.0 | **12.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Dale C Koepp](https://appshunter.io/developer/331525420) | [Tom Leon Schmidt](https://appshunter.io/developer/1634212175) |

## What reviewers say

### ExSciCalc

[App page](https://appshunter.io/ios/app/exscicalc/id1625177287)

This calculator offers enhanced precision and memory beyond standard devices. It includes advanced functions for statistics, physics, and mathematics, alongside common calculations and unit conversions.

**Highlights:** Extended precision (30+ digits), Extended memory (main + 10 auxiliary), Scroll windows for button access, Statistical calculations, Physical and mathematical constants, Unit conversions, Roots of equations, Special relativity calculations

**Features:** macOS Compatibility

**In-app purchases:** none


### Unit Eater

[App page](https://appshunter.io/ios/app/unit-eater/id6742549723)

This utility app functions as a powerful calculator that handles unit conversions and calculations. It supports a vast array of predefined units and allows users to define their own, making it ideal for scientific and academic tasks. Features include a calculation history, customizable results, and dark mode.

**Highlights:** Unit conversion and calculation, Custom unit definition, Extensive unit library, Calculation history, Customizable result format, Dark mode

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium - Monthly | $0.99 | per month |
| Premium - Pay once | $3.99 | one-time |


## Frequently asked questions

### Is ExSciCalc free?

ExSciCalc costs $1.99, with no in-app purchases.

### Is Unit Eater free?

Unit Eater is free to download, with in-app purchases available.

### Do ExSciCalc or Unit Eater have ads?

Neither ExSciCalc nor Unit Eater shows ads.

### Which is updated more often, ExSciCalc or Unit Eater?

ExSciCalc ships an update every 3 weeks, and Unit Eater every 2 weeks. Most recently, ExSciCalc was updated on June 5, 2026 and Unit Eater on September 11, 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.*