# Lumo AI by Proton vs DMR User Database

The clearest difference is rating: Lumo AI by Proton at 3.8 against DMR User Database's 2.0. Lumo AI by Proton also leads on update cadence (every 11 days vs every 3 months) and ratings volume (558 vs 2). DMR User Database's advantage is in-app purchases (none vs 2) and device support (4 vs 2). On price and ads there is nothing between them.

Both are free to download. Lumo AI by Proton sells 2 in-app purchases, starting at $12.99 per month. DMR User Database asks for nothing beyond the download.

Lumo AI by Proton holds the better App Store score, 3.8 against 2.0. That said, the two scores are not equally well evidenced: Lumo AI by Proton has 558 ratings behind it against 2, so its average is the more settled of the two.

Lumo AI by Proton ships an update every 11 days, DMR User Database every 3 months. The most recent releases landed on October 30, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | Lumo AI by Proton | DMR User Database |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.8 (558 ratings)](https://appshunter.io/ios/app/lumo-ai-by-proton/id6746714949/reviews)** | [2.0 (2 ratings)](https://appshunter.io/ios/app/dmr-user-database/id6749166551/reviews) |
| Number of ratings | **558** | 2 |
| Positive reviews | 45.9% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 11 days** | Every 3 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 103 MB | 28 MB |
| Requires iOS | 17.6 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Proton AG](https://appshunter.io/developer/979659484) | [Andreas Krenz](https://appshunter.io/developer/1829006949) |

## What reviewers say

### Lumo AI by Proton

[App page](https://appshunter.io/ios/app/lumo-ai-by-proton/id6746714949)

This AI assistant prioritizes your privacy, offering help with productivity, curiosity, and staying informed. Developed by the team behind trusted encrypted services, it ensures your data remains secure.

**Highlights:** Privacy-first AI assistant, Boost productivity, Satisfy curiosity, Stay informed, Secure data handling

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lumo Plus (1 month) | $12.99 | per month |
| Lumo Plus (12 months) | $119.99 | per year |

**What reviewers like**

- 👍 Sophisticated knowledge base
- 🚀 Rapid evolution with quality
- 💡 Potential for vision-enabled model

**What reviewers complain about**

- 🐛 Inability to answer basic questions
- 🔒 Privacy concerns with data processing
- 🐛 Inconsistent responses
- 🐛 Frequent sign-outs
- 🐛 Dark mode issues

**Reported bugs**

- Slow sign-in page
- Lack of real-time data access

**Requested features**

- Dynamic Type support for adjustable font size
- Secure access to Proton Drive files
- Ghost mode to ensure no chat history is saved
- Intuitive history clearing option
- App mode


### DMR User Database

[App page](https://appshunter.io/ios/app/dmr-user-database/id6749166551)

This app serves as a comprehensive digital phonebook for the Digital Mobile Radio (DMR) community. It allows users to quickly search for Radio IDs, Callsigns, and other user details across multiple integrated databases. Ideal for ham radio operators, it facilitates connections and exploration within the digital radio world.

**Highlights:** Comprehensive search by ID, Callsign, Name, or Location, Integrates multiple DMR databases, View users per country, Built-in logbook for radio contacts, Database export for specific devices, Interactive maps for repeaters, Offline functionality

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Lumo AI by Proton free?

Lumo AI by Proton is free to download, with in-app purchases available.

### Is DMR User Database free?

DMR User Database is free to download, with no in-app purchases.

### Which has better reviews, Lumo AI by Proton or DMR User Database?

Lumo AI by Proton is rated higher. Lumo AI by Proton averages 3.8 out of 5 from 558 ratings, while DMR User Database averages 2.0 from 2 ratings.

### Do Lumo AI by Proton or DMR User Database have ads?

Neither Lumo AI by Proton nor DMR User Database shows ads.

### Which is updated more often, Lumo AI by Proton or DMR User Database?

Lumo AI by Proton ships an update every 11 days, and DMR User Database every 3 months. Most recently, Lumo AI by Proton was updated on October 30, 2026 and DMR User Database on October 21, 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.*