2. Soika AirGap mobile application is the signer app, a dedicated offline mobile device (no network permission at all) is the signer that holds the seeds.
Is it just a mobile application or a hardware device + a mobile application where the seed and signing keys are kept? Your website doesn't mention a separate hardware device but you do touch on it in the OP briefly. Tell us more about the device. Cost, technical specs, features? What's the target audience? Will it be available for shipping worldwide, etc.?
Soika AirGap (AirGap Vault) is an OSS vault application designed for mass-market offline devices, such as an Android (version 12+) smartphone without a SIM card, internet access, or Wi-Fi connections. We recommend using a Pixel device running GrapheneOS. The user is solely responsible for the physical security and storage of the device.
We believe that using a dedicated hardware wallet is impractical, as auditing the security and entropy metrics of the underlying hardware and its modules is extremely difficult for an end-user. Additionally, specialized devices attract the attention of malicious actors, corrupt law enforcement, and others, introducing an extra attack vector. A specialized device draws too much attention, whereas just another regular smartphone is of little interest to anyone. Another advantage of this approach is that it allows a larger number of users to adopt AirGap technologies without the need to purchase a dedicated device, verify its authenticity, or waste time and money again in case of loss or damage.
With a conscious approach from the user - understanding that the AirGap Vault must be used ONLY ON A DEDICATED OFFLINE DEVICE - this setup provides an optimal compromise between asset security and convenience.
In addition to keys, the application also stores all private information, address labels, private node addresses, configurations, etc.
All network operations are executed through the Soika Wallet Desktop application.
Users can also using wallets without the AirGap feature (e.g, for frequent transactions with small amounts); everything is fully customizable and configurable. When using the desktop application without AirGap, multiple layers of security and encryption are applied. This includes hardware binding of the crypto-container, TPM utilization, and protection against tracing, brute-forcing, debugging, memory scraping, etc. We will share more details on this closer to the release.
Click the screenshots to enlarge The screenshots above were AirGap singing process taken on my Pixel 5a running GrapheneOS
the whois from
https://lookup.icann.org/en/lookup shows:
Registry Expiration: 2028-05-19 13:36:03 UTC
Registrar Expiration: 2028-05-19 00:00:00 UTC
Updated: 2026-07-05 10:31:02 UTC
Created: 2026-05-19 13:36:03 UTC
Since it's Icann they are the definitive answer to when it was registered last.
Did it expire? Not a big deal, since as you said wayback shows the site.
Just worth a mention for the paranoid people here.
-Dave
We considered using a different domain (in the .io zone), but we went back to the original one (.app). I don't see any pitfalls in changing the domain prior to release.
For example, the first name of the project was actually "Paranoid Wallet".
I believe that in today’s environment of cancel culture, hastily passed laws, and sanctions, on-chain data serves as the most appropriate SSOT (Single Source of Truth) for blockchain projects. This applies to both informing users and delivering updates via multisig-controlled contracts (or even better, having the build process for critical modules executed within a TEE enclave and initiated by a DAO).
So, we also have ENS for them:
soikawallet.eth and
unstoppable domain
soika.wallet 
