First of all, the app is open source: https://github.com/mtotschnig/MyExpenses. In addition, the apps available in the official F-Droid repo are subject to regulations. And with the app there is no hint, with undesirable features. In addition, the app is also built again by the F-Droid team and if something is noticeable there, the building is interrupted.
I can recommend the app in my experience. I also purchased a license. It will connect to licencedb.myexpenses.mobi and validate the license. After that, you can block the app traffic with a DNS filter app (personalDNSfilter, RethinkDNS, etc.). At least that's what I did.
If you still have concerns, you can contact the developers at Mastodon (@[email protected]).
Have you tried the app yet? If so, what are you missing in relation to your previous app? There would still be Oinkoin. But i think that's not what you're looking for.
There are three icons in vertical mode in the upper right. The one in the middle is for templates, there you can create entries and then plan at the bottom. However, it requires permission to the calendar.
Edit: Added that the three icons are in vertical mode.
About it's telemetry, I don't know. But considering it is open source, you can probably just google some third party who has looked into this. I had a google and found this: https://emteria.com/learn/what-is-f-droid
If you're not asking about f droid, then you should probably mention the app you're talking about