# Trajectory vs Blastwave

The clearest difference is in-app purchases: Trajectory at none against Blastwave's 2. Trajectory also leads on update cadence (fortnightly vs every 6 months). Blastwave's advantage is ads (none vs shown) and iOS requirement (15.1 vs 17.7.2). On price and device support there is nothing between them.

Both are free to download. Blastwave sells 2 in-app purchases, starting at $3.99 per month. Trajectory asks for nothing beyond the download.

Trajectory ships an update fortnightly, Blastwave every 6 months. The most recent releases landed on September 24, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Trajectory | Blastwave |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | **Fortnightly** | Every 6 months |
| Size | 36 MB | 58 MB |
| Requires iOS | 17.7.2 | **15.1** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Hideaki Uchikoshi](https://appshunter.io/developer/1559575002) | [Piotr Sielicki](https://appshunter.io/developer/1793533693) |

## What reviewers say

### Trajectory

[App page](https://appshunter.io/ios/app/trajectory-detection/id6511212764)

**Features:** macOS Compatibility

**In-app purchases:** none


### Blastwave

[App page](https://appshunter.io/ios/app/blastwave/id6741198429)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly subscription | $3.99 | per month |
| Annual subscription | $39.99 | per year |


## Frequently asked questions

### Is Trajectory free?

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

### Is Blastwave free?

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

### Do Trajectory or Blastwave have ads?

Trajectory shows ads; Blastwave does not.

### Which is updated more often, Trajectory or Blastwave?

Trajectory ships an update fortnightly, and Blastwave every 6 months. Most recently, Trajectory was updated on September 24, 2026 and Blastwave 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.*