What are you using for Syncthing on iOS?

Besides Apple’s current restrictions we don’t have a decent iOS Syncthing because there’s no financial initiative for anyone to build a good iOS App. For instance, the apps on the store seem to never have tried to properly implement background refresh. Yes it doesn’t solve all issues and it won’t be like an Android phone but it could allow for for full syncs when the phone is charging / at night and some sync time on battery.