# Blast Pressure vs Circuitry

The clearest difference is price: Circuitry at Free against Blast Pressure's $4.99. Circuitry also leads on update cadence (every 4 months vs every 8 months) and iOS requirement (12.0 vs 17.0). Blast Pressure's advantage is review sentiment (67% vs 51%). On ads, in-app purchases and device support there is nothing between them.

Circuitry is free to download; Blast Pressure costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Blast Pressure ships an update every 8 months, Circuitry every 4 months. The most recent releases landed on October 20, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | Blast Pressure | Circuitry |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | — | **[3.9 (156 ratings)](https://appshunter.io/ios/app/circuitry-3d-circuit-builder/id1476733898/reviews)** |
| Number of ratings | — | **156** |
| Positive reviews | **66.7% of reviews** | 51.4% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 4 months** |
| Monetization | Paid | **Free** |
| Size | 4 MB | 35 MB |
| Requires iOS | 17.0 | **12.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Rab Elias](https://appshunter.io/developer/918944482) | [Raffael Kaehn](https://appshunter.io/developer/1234032836) |

## What reviewers say

### Blast Pressure

[App page](https://appshunter.io/ios/app/blast-pressure/id1187622431)

This application calculates blast pressure on structures using TNT equivalence. It generates detailed reports including scaled pressure, arrival and duration times, and shock wave graphs, supporting various explosive materials for analysis and design.

**Highlights:** Blast pressure calculation, TNT equivalence analysis, Comprehensive report generation, Scaling laws and Hopkinson rule, Shock wave graphing, Support for multiple explosive materials

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

**In-app purchases:** none


### Circuitry

[App page](https://appshunter.io/ios/app/circuitry-3d-circuit-builder/id1476733898)

Build and simulate electronic circuits in an intuitive 3D environment. This app offers lightning-fast analysis and a user-friendly interface, making complex engineering accessible. Circuits are saved as documents for easy sharing and management across devices.

**Highlights:** 3D circuit building, GPU-accelerated analysis, Intuitive 3D interface, Document-based circuit files, Component placement and connection, Resistor, voltage source, light bulb components

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 💡 Cool game idea
- 👍 Nice and 3D interface
- 🚀 Easy to use and perfect 3D
- 👍 Fun and simple
- 👍 Beautifully visual and interactive

**What reviewers complain about**

- 😞 Missing many components
- 😞 Limited functionality
- 😞 Not useful for professional work
- 😞 Inaccurate electrical simulation
- 😞 App is broken/crashes

**Reported bugs**

- App crashes on launch
- App doesn't work after download
- Blank white screen on opening
- App won't open, only shows a folder
- Lights won't turn on

**Requested features**

- Add more components (diodes, transistors, capacitors, inductors, speakers, microphones, resistors, switches, LEDs, displays, transformers)
- Add labels/names for components
- Add intensity and voltage for cables
- Add undo/redo buttons
- Add tutorials or guidance videos


## Frequently asked questions

### Is Blast Pressure free?

Blast Pressure costs $4.99, with no in-app purchases.

### Is Circuitry free?

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

### Do Blast Pressure or Circuitry have ads?

Neither Blast Pressure nor Circuitry shows ads.

### Which is updated more often, Blast Pressure or Circuitry?

Blast Pressure ships an update every 8 months, and Circuitry every 4 months. Most recently, Blast Pressure was updated on October 20, 2026 and Circuitry on October 21, 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.*