# Boom.API vs Cramology

The clearest difference is update cadence: Boom.API at every 5 days against Cramology's every 9 days. On price, ads, in-app purchases and device support there is nothing between them.

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

Boom.API ships an update every 5 days, Cramology every 9 days. The most recent releases landed on October 15, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Boom.API | Cramology |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/boomapi/id6760099286/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 days** | Every 9 days |
| Monetization | Free | — |
| Size | 43 MB | 75 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Nikolai Cook](https://appshunter.io/developer/1882637001) | [Jaafar alsadeq Zamili](https://appshunter.io/developer/6800879404) |

## What reviewers say

### Boom.API

[App page](https://appshunter.io/ios/app/boomapi/id6760099286)

This app predicts if you'll hear a sonic boom from returning rocket boosters. It tracks launches, calculates blast zones, and sends personalized notifications so you know when to step outside.

**Highlights:** Tracks upcoming rocket launches, Calculates sonic boom blast zones, Interactive flight path map, Personalized location-based predictions, Customizable launch countdowns, Push notifications for launches and reschedules

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

**In-app purchases:** none


### Cramology

[App page](https://appshunter.io/ios/app/cramology/id6806441277)

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

**In-app purchases:** none


## Frequently asked questions

### Is Boom.API free?

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

### Is Cramology free?

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

### Do Boom.API or Cramology have ads?

Neither Boom.API nor Cramology shows ads.

### Which is updated more often, Boom.API or Cramology?

Boom.API ships an update every 5 days, and Cramology every 9 days. Most recently, Boom.API was updated on October 15, 2026 and Cramology 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.*