# Derma UDL vs D1 App

The clearest difference is ads: Derma UDL at none against D1 App's shown. Derma UDL also leads on iOS requirement (11.0 vs 15.0). D1 App's advantage is update cadence (every 5 weeks vs every 30 months). On price, in-app purchases and device support there is nothing between them.

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

Derma UDL ships an update every 30 months, D1 App every 5 weeks. The most recent releases landed on October 26, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | Derma UDL | D1 App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[2.6 (13 ratings)](https://appshunter.io/ios/app/d1-app/id1516386669/reviews)** |
| Number of ratings | — | **13** |
| Positive reviews | — | 17.7% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 30 months | **Every 5 weeks** |
| Monetization | — | Ad-supported |
| Size | 31 MB | 73 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 12+ |
| Developer | [SingleClick Solutions](https://appshunter.io/developer/1027240128) | [D1 S A S](https://appshunter.io/developer/1516386668) |

## What reviewers say

### Derma UDL

[App page](https://appshunter.io/ios/app/derma-udl/id1450274615)

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

**In-app purchases:** none


### D1 App

[App page](https://appshunter.io/ios/app/d1-app/id1516386669)

This shopping app helps you create market lists to save time and money. Discover new ways to shop without overspending and keep track of all your essential items.

**Highlights:** Create market lists, Save time and budget, Discover new shopping methods, Optimize purchases

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

**In-app purchases:** none


## Frequently asked questions

### Is Derma UDL free?

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

### Is D1 App free?

D1 App is free to download, with no in-app purchases.

### Do Derma UDL or D1 App have ads?

D1 App shows ads; Derma UDL does not.

### Which is updated more often, Derma UDL or D1 App?

Derma UDL ships an update every 30 months, and D1 App every 5 weeks. Most recently, Derma UDL was updated on October 26, 2026 and D1 App on October 29, 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.*