Contact
One address, and a person on the other end.
TLDR Money is built by a small team, so there is no support tier to escalate through. Email arrives with the people who write the app.
What to write about
Anything, but these get the fastest answer: a feature the app is missing, a number that looks wrong, a privacy question the privacy notice does not cover, or an argument that this is the wrong product to be building. The last one is genuinely welcome.
The email address is on the tldrmoney.in domain rather than .app. That is deliberate — it is a real, monitored mailbox that has existed for months, and pointing you at a fresh address for the sake of tidiness would mean pointing you at one nobody watches yet.
India
If you are looking for the Indian version of TLDR Money — rupees, automatic tracking from Gmail transaction alerts, and a different price — that is a separate product at tldrmoney.in. Same team, same address.