Update
I've done the release. However, because Apple would have wanted to actually review a 0.0.2 release but would be fine with me releasing whatever I wanted inside of a single incremented build...I just released the 0.18 support under 0.0.1.60.
Please try using 0.0.1.60 REGARDLESS of whether you are using a Lemmy 0.17 instance. It should work. Only downgrade if you have problems.
EDIT: From initial testing, it appears that 0.0.1.60+ should operate fine when interacting with a 0.17 Lemmy instance. Regardless, just know that if you do run into any issues to please try downgrading to 0.0.1.58 before submitting a report to see if that fixes the issue.
I will be releasing two versions here in the next hours. These will include both 0.0.1.58 and 0.0.1.60. There will be no differences feature wise between these two versions. However...
0.0.1.60 will be the final version that supports Lemmy 0.17. If you are using an instance that has not yet upgraded, please do NOT update to 0.0.1.60+ until that update happens. PLEASE petition your instance admins to upgrade their Lemmy instances ASAP.
There will be a few minor fixes in both versions for the status bar color and for the text color when creating a post. No other changes will be included.
If you have issues with logging in, please let me know. As of right now, it seems if you are already authenticated there shouldn't be anything wrong. It also may be that 0.0.1.60 works just fine with 0.17 instances. You are welcome to try. If it doesn't, just simply downgrade inside of TestFlight.
Cheers, see you with the update here soon.
I read somewhere that 0.18 should be released today or tomorrow. Some instances are already using 0.18-rc.6.