# iPowerRocket vs Rocket Calculator

The clearest difference is in-app purchases: iPowerRocket at none against Rocket Calculator's 1. iPowerRocket also leads on iOS requirement (12.0 vs 17.0). Rocket Calculator's advantage is update cadence (weekly vs every 5 months). On price, ads and device support there is nothing between them.

Both are free to download. Rocket Calculator sells 1 one-off in-app purchase. iPowerRocket asks for nothing beyond the download.

iPowerRocket ships an update every 5 months, Rocket Calculator weekly. The most recent releases landed on October 3, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | iPowerRocket | Rocket Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.3 (4 ratings)](https://appshunter.io/ios/app/ipowerrocket/id301295857/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 47.4% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Weekly** |
| Monetization | Free | — |
| Size | 10 MB | 1 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [ANDREAS MUELLER](https://appshunter.io/developer/581785922) | [毅 王](https://appshunter.io/developer/6774631380) |

## What reviewers say

### iPowerRocket

[App page](https://appshunter.io/ios/app/ipowerrocket/id301295857)

This application assists amateur rocketeers with rocket design and flight planning. It offers tools for calculating critical flight parameters, simulating trajectories, and managing flight logs. All essential calculations are conveniently available on your iPhone or iPod touch.

**Highlights:** Rocket design calculations, Flight simulation, Ejection charge calculation, Parachute dimensioning, Flight log management, Barrowman CP computation

**Features:** macOS Compatibility

**In-app purchases:** none


### Rocket Calculator

[App page](https://appshunter.io/ios/app/rocket-calculator-apogeefield/id6778329350)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ApogeeField Unlock | $4.99 | one-time |


## Frequently asked questions

### Is iPowerRocket free?

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

### Is Rocket Calculator free?

Rocket Calculator is free to download, with in-app purchases available.

### Do iPowerRocket or Rocket Calculator have ads?

Neither iPowerRocket nor Rocket Calculator shows ads.

### Which is updated more often, iPowerRocket or Rocket Calculator?

iPowerRocket ships an update every 5 months, and Rocket Calculator weekly. Most recently, iPowerRocket was updated on October 3, 2026 and Rocket Calculator on October 8, 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.*