# Boom.API vs Rock Nerd

The clearest difference is review sentiment: Boom.API at 100% against Rock Nerd's 50%. Boom.API also leads on in-app purchases (none vs 3) and rating (5.0 vs 4.7). Rock Nerd's advantage is ratings volume (6 vs 2). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Rock Nerd sells 3 in-app purchases, starting at $3.99 per month. Boom.API asks for nothing beyond the download.

Boom.API holds the better App Store score, 5.0 against 4.7. Both are backed by a comparable volume of ratings — 2 and 6 respectively. Written reviews point the same way: 100% of Boom.API's written reviews are positive against 50% of Rock Nerd's.

Boom.API ships an update every 5 days, Rock Nerd every 9 days. The most recent releases landed on October 15, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | Boom.API | Rock Nerd |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/boomapi/id6760099286/reviews)** | [4.7 (6 ratings)](https://appshunter.io/ios/app/rock-nerd-rockhound-map-guide/id6760951948/reviews) |
| Number of ratings | 2 | **6** |
| Positive reviews | **100.0% of reviews** | 50.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 5 days** | Every 9 days |
| Monetization | **Free** | Freemium |
| Size | 43 MB | 107 MB |
| Requires iOS | 15.1 | 15.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 9+ |
| Developer | [Nikolai Cook](https://appshunter.io/developer/1882637001) | [Terry Brazil](https://appshunter.io/developer/1886983801) |

## 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


### Rock Nerd

[App page](https://appshunter.io/ios/app/rock-nerd-rockhound-map-guide/id6760951948)

Discover and identify rocks with a comprehensive map of over 2,300 locations. Track your finds, connect with other enthusiasts, and learn about geology. Premium features unlock worldwide access and advanced community tools.

**Highlights:** 2,300+ rockhounding locations, Smart regional rock identification wizard, Personalized collection tracker (My Vault), Rock Buddy matching for hunting partners, Trip planner and sharing, Community activity feed and messaging

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Rock Nerd Monthly Subscription | $3.99 | per month |
| Rock Nerd Yearly Subscription | $39.99 | per year |
| Rock Nerd Lifetime Premium | $99.99 | one-time |


## Frequently asked questions

### Is Boom.API free?

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

### Is Rock Nerd free?

Rock Nerd is free to download, with in-app purchases available.

### Which has better reviews, Boom.API or Rock Nerd?

Boom.API is rated higher. Boom.API averages 5.0 out of 5 from 2 ratings, while Rock Nerd averages 4.7 from 6 ratings.

### Do Boom.API or Rock Nerd have ads?

Neither Boom.API nor Rock Nerd shows ads.

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

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