# OBSERV 520x vs GL0W

The clearest difference is in-app purchases: OBSERV 520x at none against GL0W's 1. OBSERV 520x also leads on ratings volume (5 vs 1). GL0W's advantage is update cadence (every 3 days vs every 2 weeks). On price, rating, ads and device support there is nothing between them.

Both are free to download. GL0W sells 1 in-app purchase, starting at $9.99 per month. OBSERV 520x asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for OBSERV 520x against 5.0 for GL0W. That said, the two scores are not equally well evidenced: OBSERV 520x has 5 ratings behind it against 1, so its average is the more settled of the two.

OBSERV 520x ships an update every 2 weeks, GL0W every 3 days. The most recent releases landed on October 24, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | OBSERV 520x | GL0W |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (5 ratings)](https://appshunter.io/ios/app/observ-520x/id1495658461/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/gl0w/id6792526709/reviews) |
| Number of ratings | **5** | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 3 days** |
| Monetization | **Free** | Freemium |
| Size | 104 MB | 27 MB |
| Requires iOS | **16.6** | 17.0 |
| Devices | iPad | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [InnoFaith beauty sciences](https://appshunter.io/developer/583003631) | [RUCHA D DAVE](https://appshunter.io/developer/1895048326) |

## What reviewers say

### OBSERV 520x

[App page](https://appshunter.io/ios/app/observ-520x/id1495658461)

This professional tool uses advanced visualization technology to analyze skin concerns from various perspectives. It helps professionals engage clients by providing objective images of skin conditions, demonstrating treatment progress, and informing treatment plans.

**Highlights:** Advanced skin visualization technology, Objective imaging of skin concerns, Client engagement and consultation tool, Treatment progress tracking, Inform treatment plan adjustments, Insight into subsurface skin layers

**In-app purchases:** none


### GL0W

[App page](https://appshunter.io/ios/app/gl0w/id6792526709)

This app helps you track your skin's progress over time with daily face scans and personalized reminders. It features an AI coach for skin education and gamified elements to keep you motivated, focusing on building confidence and understanding your skin.

**Highlights:** Daily face scanning, Skin progress tracking, Personalized reminders, AI skin education coach, Gamified motivation (streaks, milestones), Confidence-building focus

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| premium | $9.99 | per month |


## Frequently asked questions

### Is OBSERV 520x free?

OBSERV 520x is free to download, with no in-app purchases.

### Is GL0W free?

GL0W is free to download, with in-app purchases available.

### Which has better reviews, OBSERV 520x or GL0W?

OBSERV 520x and GL0W are both rated 5.0 out of 5 on the App Store, from 5 and 1 ratings respectively.

### Do OBSERV 520x or GL0W have ads?

Neither OBSERV 520x nor GL0W shows ads.

### Which is updated more often, OBSERV 520x or GL0W?

OBSERV 520x ships an update every 2 weeks, and GL0W every 3 days. Most recently, OBSERV 520x was updated on October 24, 2026 and GL0W on October 3, 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.*