# Principle Mirror vs PuddingAlarm

The clearest difference is in-app purchases: Principle Mirror at none against PuddingAlarm's 1. Principle Mirror also leads on device support (3 vs 1) and iOS requirement (11.0 vs 26.1). PuddingAlarm's advantage is update cadence (every 10 days vs every 2 months). On price and ads there is nothing between them.

Both are free to download. PuddingAlarm sells 1 one-off in-app purchase. Principle Mirror asks for nothing beyond the download.

Principle Mirror ships an update every 2 months, PuddingAlarm every 10 days. The most recent releases landed on October 29, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Principle Mirror | PuddingAlarm |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.2 (14 ratings)](https://appshunter.io/ios/app/principle-mirror/id991911319/reviews)** | — |
| Number of ratings | **14** | — |
| Positive reviews | 45.2% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 10 days** |
| Monetization | Free | — |
| Size | 1 MB | 9 MB |
| Requires iOS | **11.0** | 26.1 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Daniel Hooper](https://appshunter.io/developer/419502228) | [利悦 冀](https://appshunter.io/developer/6792959894) |

## What reviewers say

### 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


### PuddingAlarm

[App page](https://appshunter.io/ios/app/puddingalarm-future-reminder/id6792993599)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Early Bird PRO Membership | $4.99 | one-time |


## Frequently asked questions

### Is Principle Mirror free?

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

### Is PuddingAlarm free?

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

### Do Principle Mirror or PuddingAlarm have ads?

Neither Principle Mirror nor PuddingAlarm shows ads.

### Which is updated more often, Principle Mirror or PuddingAlarm?

Principle Mirror ships an update every 2 months, and PuddingAlarm every 10 days. Most recently, Principle Mirror was updated on October 29, 2026 and PuddingAlarm on October 24, 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.*