Any plans to deploy on a testnet?

Are there any plans to deploy Gnosis Safe on a testnet?

The Gnosis Safe contracts are deployed by Gnosis to the following testnets: Rinkeby, Görli, Kovan, Volta.
The full list can be found here: https://github.com/gnosis/safe-contracts/blob/development/networks.json

The canonical contracts can be deployed to the same addresses to any EVM based network with https://github.com/gnosis/safe-contract-deployment-replay.
Seems like someone did that e.g. for Ropsten.

Interface-wise, the main test network for us is Rinkeby. The Gnosis Safe web interface can be found here: https://rinkeby.gnosis-safe.io/app/.
Links for Gnosis Safe Rinkeby mobile apps can be found here: https://gnosis-safe.io/#mobile

https://docs.gnosis.io/safe/docs/contracts_other_evm/ has more technical info on what it takes to run Gnosis Safe on other networks.

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