# eigenCalc vs pocketFORTH

eigenCalc and pocketFORTH are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

eigenCalc ships an update monthly, pocketFORTH every 3 weeks. The most recent releases landed on September 17, 2026 and July 17, 2026 respectively.

## The numbers

| Metric | eigenCalc | pocketFORTH |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 3 weeks** |
| Size | 2 MB | 1 MB |
| Requires iOS | **15.5** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Luis Acevedo-Arreguin](https://appshunter.io/developer/1642773653) | [Leonardo Del Nonno](https://appshunter.io/developer/1813215809) |

## What reviewers say

### eigenCalc

[App page](https://appshunter.io/ios/app/eigencalc/id6503222785)

**Features:** macOS Compatibility

**In-app purchases:** none


### pocketFORTH

[App page](https://appshunter.io/ios/app/pocketforth/id6774230596)

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

**In-app purchases:** none


## Frequently asked questions

### Is eigenCalc free?

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

### Is pocketFORTH free?

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

### Do eigenCalc or pocketFORTH have ads?

Neither eigenCalc nor pocketFORTH shows ads.

### Which is updated more often, eigenCalc or pocketFORTH?

eigenCalc ships an update monthly, and pocketFORTH every 3 weeks. Most recently, eigenCalc was updated on September 17, 2026 and pocketFORTH on July 17, 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.*