This incident has been resolved.

We're aware that some customers on iOS are seeing the CoinJar app close unexpectedly when opening it or shortly afterwards. This is caused by an issue with a third-party service provider and is not related to your account or funds. Your funds and account are safe. In the meantime, you can continue to access your account and trade via the CoinJar web app at https://app.coinjar.com/ We're working with our provider on a fix and will post updates here.