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Altana - Bitcoin Wallet

latest release: Varies with device last analysed  9th April 2021
Not reproducible from the source provided
4.4 ★★★★★
47 ratings


Our last analysis is based on data found in their Play Store description and their website and their source repository. We discuss issues with the provider here.
details below 

Do your own research!

Try out searching for "lost bitcoins", "stole my money" or "scammers" together with the wallet's name, even if you think the wallet is generally trustworthy. For all the bigger wallets you will find accusations. Make sure you understand why they were made and if you are comfortable with the provider's reaction.

If you find something we should include, you can create an issue or edit this analysis yourself and create a merge request for your changes.

The Analysis

This analysis is based on this issue by Emanuel.

This app is a fork of the currently reproducible “Green: Bitcoin Wallet” and supports Bitcoin with the same timelock-and-multisig setup as Green.

Altana is based on services offered by GreenAddress.

sounds like the app doesn’t come with their own servers but relies on Blockstream’s servers.

“Their website” has only a small section on the wallet which basically links back to Google Play for details and a code repository is nowhere to be found. But I think Emanuel found this wallet the other way around, by searching GitHub for Bitcoin wallets and so he shared this repo

Emanuel also managed to build the wallet but with plenty of differences to the version from Google Play. Until those are resolved, the app is not verifiable. Check the issue for details.

(em, lw)

Verdict Explained

Not reproducible from the source provided

The app provider also shares code but we could so far not verify that the published code matches the published app!

This verdict means that the provider did share some source code but that we could not verify that this source code matches the released app. This might be due to the source being released later than the app or due to the provided instructions on how to compile the app not being sufficient or due to the provider excluding parts from the public source code. In any case, the result is a discrepancy between the app we can create and the app we can find on GooglePlay and any discrepancy might leak your backup to the server on purpose or by accident.

As we cannot verify that the source provided is the source the app was compiled from, this category is only slightly better than closed source but for now we have hope projects come around and fix verifiability issues.

The app cannot be independently verified. If the provider puts your funds at risk on purpose or by accident, you will probably not know about the issue before people start losing money. If the provider is more criminally inclined he might have collected all the backups of all the wallets, ready to be emptied at the press of a button. The app might have a formidable track record but out of distress or change in management turns out to be evil from some point on, with nobody outside ever knowing before it is too late.