# uunn vs GUM SMART

The clearest difference is in-app purchases: uunn at none against GUM SMART's 1. GUM SMART's advantage is device support (3 vs 1). On price, update cadence, ads and iOS requirement there is nothing between them.

Both are free to download. GUM SMART sells 1 in-app purchase, starting at $27.49 per year. uunn asks for nothing beyond the download.

uunn ships an update every 6 weeks, GUM SMART every 2 months. The most recent releases landed on September 29, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | uunn | GUM SMART |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.8 (4 ratings)](https://appshunter.io/ios/app/gum-smart/id1473619600/reviews)** |
| Number of ratings | — | **4** |
| Positive reviews | — | 40.7% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 2 months |
| Monetization | — | Free with in-app purchases |
| Size | 79 MB | 192 MB |
| Requires iOS | 16.2 | **15.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [Onaria Technologies Ltd.](https://appshunter.io/developer/1460656211) | [PLAYBRUSH LTD](https://appshunter.io/developer/959404938) |

## What reviewers say

### uunn

[App page](https://appshunter.io/ios/app/uunn/id1460656212)

**Features:** macOS Compatibility

**In-app purchases:** none


### GUM SMART

[App page](https://appshunter.io/ios/app/gum-smart/id1473619600)

This app helps you build healthier brushing habits with personalized support and real-time coaching. It offers insights into your brushing coverage, frequency, duration, and pressure, and provides tailored advice. It works with any toothbrush and offers full functionality when paired with a compatible electric model.

**Highlights:** Personalized brushing support, Real-time brushing coach, Brushing insights and stats, Tailored oral hygiene advice, Brushing session logging, Customizable reminders

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Yearly Playbrush Subscription | $27.49 | per year |


## Frequently asked questions

### Is uunn free?

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

### Is GUM SMART free?

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

### Do uunn or GUM SMART have ads?

Neither uunn nor GUM SMART shows ads.

### Which is updated more often, uunn or GUM SMART?

uunn ships an update every 6 weeks, and GUM SMART every 2 months. Most recently, uunn was updated on September 29, 2026 and GUM SMART 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.*