# Lexar vs Lumo AI by Proton

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 3.8). 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.

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.

Lexar holds the better App Store score, 4.1 against 3.8. 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.

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

## The numbers

| Metric | Lexar | Lumo AI by Proton |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.1 (19 ratings)](https://appshunter.io/ios/app/lexar/id6670745871/reviews)** | [3.8 (568 ratings)](https://appshunter.io/ios/app/lumo-ai-by-proton/id6746714949/reviews) |
| Number of ratings | 19 | **568** |
| Positive reviews | **69.2% of reviews** | 45.9% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 11 days** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 98 MB | 103 MB |
| Requires iOS | **17.0** | 17.6 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Lexar International](https://appshunter.io/developer/1767329538) | [Proton AG](https://appshunter.io/developer/979659484) |

## What reviewers say

### Lexar

[App page](https://appshunter.io/ios/app/lexar/id6670745871)

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:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### 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


## Frequently asked 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 3.8 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.

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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.*