# Harry's Dyno vs Prisma Electronics

The clearest difference is price: Prisma Electronics at Free against Harry's Dyno's $3.99. Harry's Dyno's advantage is update cadence (every 3 months vs every 7 months) and iOS requirement (12.0 vs 17.0). On ads, in-app purchases and device support there is nothing between them.

Prisma Electronics is free to download; Harry's Dyno costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Harry's Dyno ships an update every 3 months, Prisma Electronics every 7 months. The most recent releases landed on September 18, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | Harry's Dyno | Prisma Electronics |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | **[1.0 (2 ratings)](https://appshunter.io/ios/app/harrys-dyno/id1148400332/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 7 months |
| Monetization | Paid | — |
| Size | 41 MB | 14 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Harald Schlangmann](https://appshunter.io/developer/307688601) | [Prisma Electronics srl](https://appshunter.io/developer/1766155967) |

## What reviewers say

### Harry's Dyno

[App page](https://appshunter.io/ios/app/harrys-dyno/id1148400332)

Measure vehicle performance with high precision using GPS and OBD sensors. Test acceleration and deceleration across custom speed ranges, analyze detailed results, and store data locally. Supports external sensors for enhanced accuracy.

**Highlights:** GPS and OBD sensor integration, Custom speed range testing (acceleration/deceleration), Detailed results analysis, Two-cursor data inspection, Local data storage and filtering, Data export to various formats

**In-app purchases:** none


### Prisma Electronics

[App page](https://appshunter.io/ios/app/prisma-electronics/id6670408611)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Harry's Dyno free?

Harry's Dyno costs $3.99, with no in-app purchases.

### Is Prisma Electronics free?

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

### Do Harry's Dyno or Prisma Electronics have ads?

Neither Harry's Dyno nor Prisma Electronics shows ads.

### Which is updated more often, Harry's Dyno or Prisma Electronics?

Harry's Dyno ships an update every 3 months, and Prisma Electronics every 7 months. Most recently, Harry's Dyno was updated on September 18, 2026 and Prisma Electronics on September 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.*