# Lumo AI by Proton vs ProofKeep Receipts

The clearest difference is review sentiment: ProofKeep Receipts at 100% against Lumo AI by Proton's 46%. ProofKeep Receipts also leads on rating (5.0 vs 3.8) and update cadence (every 2 days vs every 11 days). Lumo AI by Proton's advantage is ratings volume (559 vs 1). On price, ads, in-app purchases and monetization model 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 and ProofKeep Receipts sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

ProofKeep Receipts holds the better App Store score, 5.0 against 3.8. That said, the two scores are not equally well evidenced: Lumo AI by Proton has 559 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 46% of Lumo AI by Proton's written reviews are positive against 100% of ProofKeep Receipts's.

Lumo AI by Proton ships an update every 11 days, ProofKeep Receipts every 2 days. The most recent releases landed on November 1, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Lumo AI by Proton | ProofKeep Receipts |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.8 (559 ratings)](https://appshunter.io/ios/app/lumo-ai-by-proton/id6746714949/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/proofkeep-receipts/id6778573128/reviews)** |
| Number of ratings | **559** | 1 |
| Positive reviews | 45.9% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 11 days | **Every 2 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 103 MB | 4 MB |
| Requires iOS | 17.6 | **17.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Proton AG](https://appshunter.io/developer/979659484) | [Deepak Sharma](https://appshunter.io/developer/6778109504) |

## 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


### ProofKeep Receipts

[App page](https://appshunter.io/ios/app/proofkeep-receipts/id6778573128)

This app helps you quickly locate purchase proof by scanning your photo library or selected images. It automatically detects and organizes receipts, return labels, and other important documents into a private, searchable vault on your device.

**Highlights:** Auto-scan photo library, Local receipt detection, Private vault storage, Searchable by text and store, Organizes by type and month, Tracks return labels and warranties

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ProofKeep Pro Lifetime | $1.99 | one-time |


## Frequently asked questions

### Is Lumo AI by Proton free?

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

### Is ProofKeep Receipts free?

ProofKeep Receipts is free to download, with in-app purchases available.

### Which has better reviews, Lumo AI by Proton or ProofKeep Receipts?

ProofKeep Receipts is rated higher. Lumo AI by Proton averages 3.8 out of 5 from 559 ratings, while ProofKeep Receipts averages 5.0 from 1 ratings.

### Do Lumo AI by Proton or ProofKeep Receipts have ads?

Neither Lumo AI by Proton nor ProofKeep Receipts shows ads.

### Which is updated more often, Lumo AI by Proton or ProofKeep Receipts?

Lumo AI by Proton ships an update every 11 days, and ProofKeep Receipts every 2 days. Most recently, Lumo AI by Proton was updated on November 1, 2026 and ProofKeep Receipts on October 31, 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.*