# Userbrain Recorder vs Principle Mirror

The clearest difference is rating: Principle Mirror at 4.2 against Userbrain Recorder's 1.3. Principle Mirror also leads on review sentiment (45% vs 21%) and ratings volume (14 vs 3). Userbrain Recorder's advantage is update cadence (every 3 weeks vs every 2 months). On price, ads, in-app purchases and monetization model there is nothing between them.

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

Principle Mirror holds the better App Store score, 4.2 against 1.3. Both are backed by a comparable volume of ratings — 3 and 14 respectively. Written reviews point the same way: 21% of Userbrain Recorder's written reviews are positive against 45% of Principle Mirror's.

Userbrain Recorder ships an update every 3 weeks, Principle Mirror every 2 months. The most recent releases landed on October 14, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Userbrain Recorder | Principle Mirror |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.3 (3 ratings)](https://appshunter.io/ios/app/userbrain-recorder/id929636134/reviews) | **[4.2 (14 ratings)](https://appshunter.io/ios/app/principle-mirror/id991911319/reviews)** |
| Number of ratings | 3 | **14** |
| Positive reviews | 20.5% of reviews | **45.2% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 2 months |
| Monetization | Free | Free |
| Size | 36 MB | 1 MB |
| Requires iOS | 15.1 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Userbrain GmbH](https://appshunter.io/developer/1539905865) | [Daniel Hooper](https://appshunter.io/developer/419502228) |

## What reviewers say

### Userbrain Recorder

[App page](https://appshunter.io/ios/app/userbrain-recorder/id929636134)

Earn money by providing feedback on digital products and services. Record your user experience, share your opinions, and receive invitations to test for global brands. The app only records during active testing sessions, ensuring your data privacy.

**Highlights:** Earn money for feedback, Record user experience, Share opinions, Test global brands' products, Easy application process, Data privacy during testing

**Features:** Vision Pro support

**In-app purchases:** none


### Principle Mirror

[App page](https://appshunter.io/ios/app/principle-mirror/id991911319)

Design interactive user interfaces with this companion app for a popular Mac design tool. Seamlessly open Principle files or mirror your Mac's design work directly to your device.

**Highlights:** Open Principle files, Mirror Principle for Mac, Interactive UI design, Companion app functionality

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Userbrain Recorder free?

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

### Is Principle Mirror free?

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

### Which has better reviews, Userbrain Recorder or Principle Mirror?

Principle Mirror is rated higher. Userbrain Recorder averages 1.3 out of 5 from 3 ratings, while Principle Mirror averages 4.2 from 14 ratings.

### Do Userbrain Recorder or Principle Mirror have ads?

Neither Userbrain Recorder nor Principle Mirror shows ads.

### Which is updated more often, Userbrain Recorder or Principle Mirror?

Userbrain Recorder ships an update every 3 weeks, and Principle Mirror every 2 months. Most recently, Userbrain Recorder was updated on October 14, 2026 and Principle Mirror on October 16, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*