# RMS Calculator vs GeerGap

The clearest difference is price: GeerGap at Free against RMS Calculator's $1.99. GeerGap also leads on update cadence (weekly vs every 15 months). RMS Calculator's advantage is iOS requirement (12.0 vs 15.6). On ads, in-app purchases and device support there is nothing between them.

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

RMS Calculator ships an update every 15 months, GeerGap weekly. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | RMS Calculator | GeerGap |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 15 months | **Weekly** |
| Size | 8 MB | 1 MB |
| Requires iOS | **12.0** | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | +4 | 4+ |
| Developer | [Kei Suefuji](https://appshunter.io/developer/1388335881) | [Nancy Benoit](https://appshunter.io/developer/1893652634) |

## What reviewers say

### RMS Calculator

[App page](https://appshunter.io/ios/app/rms-calculator/id1511092361)

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

**In-app purchases:** none


### GeerGap

[App page](https://appshunter.io/ios/app/geergap/id6762285271)

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

**In-app purchases:** none


## Frequently asked questions

### Is RMS Calculator free?

RMS Calculator costs $1.99, with no in-app purchases.

### Is GeerGap free?

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

### Do RMS Calculator or GeerGap have ads?

Neither RMS Calculator nor GeerGap shows ads.

### Which is updated more often, RMS Calculator or GeerGap?

RMS Calculator ships an update every 15 months, and GeerGap weekly. Most recently, RMS Calculator was updated on November 3, 2026 and GeerGap on October 31, 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.*