Comparison

Lexar vs Lumo AI by Proton

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

Head to head
About

Lexar

This app provides a professional solution for backing up and transferring files to compatible storage devices. It offers quick offloading of photos, videos, and other personal files with built-in data verification for security and accuracy.

Highlights
  • Professional file backup
  • Fast file transfer
  • Secure data transfer
  • Effortless file organization
  • Quick offload from SD cards
  • Data verification
Features
Read full description

Lexar App is your professional personal data manager, providing an efficient, convenient, and secure local data backup and management experience. [Key Features] Phone Backup: Back up phone photos, files, and contacts. Efficient backups and safely free up your phone's storage space. Easy Management: View and manage data on your storage devices with clear categorization for quick and easy access. Phone Clone: Easily transfer data from your old phone to a new one using Lexar storage devices. Quick Offload: Quickly and securely copy data with Lexar Workflow Go products. NFC Unlock: Fast, tap-to-unlock convenience for Lexar TouchLock SSD via NFC, combining security with ease of use.

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

Screenshots

Lexar4 screens
Lumo AI by Proton4 screens

Verdict

The call

The clearest difference is in-app purchases: Lexar at none against Lumo AI by Proton's 2. Lexar also leads on review sentiment (69% vs 46%) and rating (4.1 vs 3.9). Lumo AI by Proton's advantage is ratings volume (568 vs 19). On price, update cadence, ads and device support 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. Lexar asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Lexar holds the better App Store score, 4.1 against 3.9. That said, the two scores are not equally well evidenced: Lumo AI by Proton has 568 ratings behind it against 19, so its average is the more settled of the two. Written reviews point the same way: 69% of Lexar's written reviews are positive against 46% of Lumo AI by Proton's.

UpkeepUpdate frequency

Lexar ships an update every 3 weeks, Lumo AI by Proton every 11 days. Both last shipped on November 12, 2026.

Scorecard5 real differences · 5 level
Lexar versus Lumo AI by Proton: the parameters behind the verdict, then further details
ParameterLexarLumo AI by Proton
PriceFreeFree
Rating4.1 (19 ratings) — better3.9 (568 ratings)
Positive reviews69.2% of reviews — better45.9% of reviews
Number of ratings19568 — better
Update frequencyEvery 3 weeksEvery 11 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhoneiPhone, iPad — better
Requires iOS17.0 — better17.6
Further details — not scored
Size98 MB103 MB
Age rating4+4+
DeveloperLexar InternationalProton AG

Customer experience

Lexar

All ratings19 ratings
Positive78.9%
Neutral5.3%
Negative15.8%
Written reviews13 reviews
Positive69.2%
Neutral0.0%
Negative30.8%

Lumo AI by Proton

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

Bugs and requests

Lexar

Not enough reviews yet to summarise bugs or 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

In-app purchases

None

Lexar

No in-app purchases

2 purchases

Lumo AI by Proton

Subscriptions2
  • Lumo Plus (1 month)$12.991 Month
  • Lumo Plus (12 months)$119.991 Year

Questions

Is Lexar free?
Lexar is free to download, with no in-app purchases.
Is Lumo AI by Proton free?
Lumo AI by Proton is free to download, with in-app purchases available.
Which has better reviews, Lexar or Lumo AI by Proton?
Lexar is rated higher. Lexar averages 4.1 out of 5 from 19 ratings, while Lumo AI by Proton averages 3.9 from 568 ratings.
Do Lexar or Lumo AI by Proton have ads?
Neither Lexar nor Lumo AI by Proton shows ads.
Which is updated more often, Lexar or Lumo AI by Proton?
Lexar ships an update every 3 weeks, and Lumo AI by Proton every 11 days. Most recently, Lexar was updated on November 12, 2026 and Lumo AI by Proton on November 12, 2026.

Other comparisons