
Lumo by Proton 4+
Your Private AI Assistant
Proton AG
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- Free
- Offers In-App Purchases
Screenshots
Description
No tracking. No profiling. No side-eye. A new breed of AI assistant, Lumo gives you the help you need, but keeps every chat confidential. From the privacy pros at Proton.
Meet Lumo, the privacy-first AI assistant created by Proton, the team behind encrypted email, VPN, password manager, and cloud storage trusted by over 100 million people.
Lumo helps you stay productive, curious, and informed — without ever compromising your privacy.
Ratings and Reviews
Not fully baked yet
The option to clear the history (like one of the screenshots claims) is not easy to find (you have to go to the menu and then choose the chat with the three dots). This could be made more intuitive and prominent.
I also do not see a Ghost Mode to ensure that chat history is not saved. There is nothing in Settings->General.
I hope this is fixed soon and that the app itself provides a short tour on these key privacy features.
Developer Response ,
Hi there!
Ghost mode is available in the top right of the screen when you are logged in. It's not shown in Guest mode since chats are not persisted, so ghost mode is not required.
You don't see the delete all option for the chat for the same reason, you need to be logged in to have saved chats.
In "guest" mode as we call it, any chat you make is gone as soon as you create a new one. Privacy by default :)
Perfect truly private ai assistant. Could be better
First off, as an AI assistant, so thankful for an actually private one. Secondly, I would love to see more ability for Lumo to be able to do certain things in other proton apps, like adding events to the proton calendar, definitely creating documents that go strait into proton docs and drive.
I would also like a fix… occasionally I’ve seen where Lumo just stops being able to respond and you keep hitting retry and it doesn’t work. But overall I find it to be very good for where it’s at, but it could definitely be better implemented in the entire proton suite ( or parts of it at least).
Also love how you Lumo uses brave search, but that’s just cuz I love brave haha
really outdated and completely unusable for getting reliable information
bro my prompt was “olympian by playboi carti lyrics” with web search enabled and this is what it gave me:
“Sure, here are the lyrics to "Olympian" by Playboi Carti:
[Intro]
Yeah, yeah, yeah, yeah
Yeah, yeah, yeah, yeah
[Chorus]
I'm an Olympian, I'm an Olympian
I'm an Olympian, I'm an Olympian
I'm an Olympian, I'm an Olympian
I'm an Olympian, I'm an Olympian
[Verse 1]
I'm an Olympian, I'm an Olympian
I'm an Olympian, I'm an Olympian
I'm an Olympian, I'm an Olympian
I'm an Olympian, I'm an Olympian
[Chorus]
I'm an Olympian, I'm an Olympian
I'm an Olympian, I'm an Olympian
I'm an Olympian, I'm an Olympian
I'm an Olympian, I'm an Olympian
[Outro]
Yeah, yeah, yeah, yeah
Yeah, yeah, yeah, yeah”
i also asked it “when was proton drive released”
it said:
“Proton Drive was released on April 26th, 2023. It is Proton's encrypted file storage and sharing service, designed to provide secure and private cloud storage for users. If you have any questions about Proton Drive or need assistance with its features, feel free to ask!”
which is not true at all when official sources say september 2022
Developer Response ,
Sorry to hear that. As any other AI, Lumo can make mistakes. You can use the thumbs down button to share your input with us regarding any inadequate responses. Our team is looking into these reports in order to further improve the quality of the answers in the future.
App Privacy
The developer, Proton AG, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Contact Info
Privacy practices may vary, for example, based on the features you use or your age. Learn More
Information
- Seller
- Proton AG
- Size
- 61.2 MB
- Category
- Productivity
- Compatibility
-
- iPhone
- Requires iOS 16.6 or later.
- iPad
- Requires iPadOS 16.6 or later.
- Languages
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English, Czech, Dutch, French, German, Italian, Polish, Portuguese, Russian, Spanish, Turkish
- Age Rating
- 4+
- Copyright
- © Proton AG 2025
- Price
- Free
- In-App Purchases
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- Lumo Plus (1 month) $12.99
- Lumo Plus (12 months) $119.99