Comparison

Lumo AI by Proton vs DMR User Database

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Lumo AI by Proton

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
Read full description

Lumo is a zero-access encrypted AI assistant that keeps every conversation private. Your data is never logged, shared, or used to train models. Your chats are yours, and yours alone. Built by Proton, the privacy brand trusted by over 100 million people and the team behind Proton Mail, VPN, Drive, and Pass. THOUGHTFUL HELP FOR ANY TASK Lumo handles everything from quick questions to more complex work. Choose Fast for quick answers or Thinking for multi-step reasoning. FAST, POWERFUL WEB SEARCH Get precise, real-time answers in seconds. Lumo cites live sources so you can verify facts, dig deeper, and stay current on news, events, financial data, and more. CREATE AND REFINE IMAGES AND FILES Work with images and files just by telling Lumo what you need, from generating and editing images to analyzing documents. Connect your Proton Drive account for seamless access to stored files. AI THAT EVOLVES OVER TIME Lumo gets better every time you use it. Memory retains context and preferences across sessions, and you can set tones and styles to get the exact Lumo experience you want. STAY PRODUCTIVE AND ORGANIZED Projects give you dedicated encrypted spaces for tasks that span multiple chats, files, and instructions, while Custom Lumos let you create assistants tailored for specific tasks. Switch between light and dark modes for a more comfortable experience throughout the day. GHOST MODE For conversations where you want maximum privacy, choose Ghost Mode. Chats are instantly deleted once you close them for greater peace of mind. PRIVACY YOU CAN VERIFY Lumo is founded on zero-access encryption with no server-side chat logs, and never uses your data for profit or model training. Like all Proton products, Lumo is built and hosted in Europe and is fully open-source. Lumo helps you stay productive, curious, and informed — without ever compromising your privacy. Start a confidential chat for free today. For more information, visit our website: https://lumo.proton.me/about Terms of service: https://lumo.proton.me/legal/terms Terms of use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Our open-source code base: https://github.com/ProtonLumo/ios-lumo

About

DMR User Database

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
Read full description

As a Digital Mobile Radio (DMR) enthusiast, you understand the importance of having easy access to detailed contact information about other users in the network. The DMR User Database app is here to provide you with a comprehensive digital phonebook for the DMR community, making it easier to find Radio IDs, Callsigns and user details in just a few taps. Developed by PD2EMC, this app is designed specifically for Hamradio operators, with powerful features that help you connect, communicate, and stay informed in the world of digital radio. What is the DMR User Database App? The DMR User Database App acts as a digital phonebook, giving you quick access to contact details of thousands of DMR users worldwide. It integrates multiple databases such as RadioID, NXDN, Hamvoip, HamshackHotline, Dapnet, and Repeaters Database, allowing you to search for users by their Radio ID (Extension), Callsign, Name or even location. Whether you are looking for a new contact, repeaters in your area, or exploring the world of digital radio, this app has you covered. Key Features of DMR User Database App: Comprehensive Search Options: Search for DMR users in RadioID, NXDN, Hamvoip, HamshackHotline, Dapnet, and Repeaters Database by Callsign, Radio ID (Extension), Name, Location (City, State or Country) or lazy search thru all databases by Callsign. Users Per Country: View the number of users in each country and explore the global reach of the DMR network. Logbook: Keep track of your radio contacts and activities with the built-in logbook feature, designed to log your callsigns, timestamps, and notes. Database Export: Export databases for devices like Anytone and Voip Phones (available on Windows/macOS). Fox Hunting: Engage in exciting fox hunting activities by locating the first fox in the app. Interactive Maps: Discover nearby repeaters and hackerspaces with interactive maps. Offline Functionality: Enjoy full access to the user databases and most features even when you are offline, making it ideal for areas with limited connectivity. Why you should download the DMR User Database App? The DMR User Database app is your go-to tool for connecting with the global DMR community. Whether you're a new user looking for contacts or an experienced operator searching for repeaters or DMR IDs, this app makes it easy to find exactly what you need. With interactive maps, offline functionality and the ability to log your radio activity, you can stay connected to the DMR network and explore new radio experiences. Download the DMR User Database app today and keep the global DMR community at your fingertips!

Screenshots

Lumo AI by Proton4 screens
DMR User Database4 screens

Verdict

The call

The clearest difference is rating: Lumo AI by Proton at 3.9 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 (557 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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

Lumo AI by Proton holds the better App Store score, 3.9 against 2.0. That said, the two scores are not equally well evidenced: Lumo AI by Proton has 557 ratings behind it against 2, so its average is the more settled of the two.

UpkeepUpdate frequency

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.

Scorecard7 real differences · 3 level
Lumo AI by Proton versus DMR User Database: the parameters behind the verdict, then further details
ParameterLumo AI by ProtonDMR User Database
PriceFreeFree
Rating3.9 (557 ratings) — better2.0 (2 ratings)
Positive reviews45.9% of reviews—
Number of ratings557 — better2
Update frequencyEvery 11 days — betterEvery 3 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPadiPhone, iPad, iPod, Mac — better
Requires iOS17.615.0 — better
Further details — not scored
Size103 MB28 MB
Age rating4+4+
DeveloperProton AGAndreas Krenz

Customer experience

Lumo AI by Proton

All ratings547 ratings
Positive67.5%
Neutral10.4%
Negative22.1%
Written reviews575 reviews
Positive45.9%
Neutral18.3%
Negative35.8%

DMR User Database

All ratings1 ratings
Positive0.0%
Neutral0.0%
Negative100.0%

Bugs and requests

Lumo AI by Proton

Reported bugs

2 issues
  • Slow sign-in page
  • Lack of real-time data access

Requested features

5 requests
  • 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

Not enough reviews yet to summarise bugs or requests.

In-app purchases

2 purchases

Lumo AI by Proton

Subscriptions2
  • Lumo Plus (1 month)$12.991 Month
  • Lumo Plus (12 months)$119.991 Year
None

DMR User Database

No in-app purchases

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 3.9 out of 5 from 557 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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