Short answer
Historr is private by design. It has no cloud account, no clipboard sync server, and no telemetry. Clipboard history is stored locally on your device.
What leaves your Mac?
Your clipboard history does not leave your Mac. The website can collect your email only if you enter it in the download form, but the app itself does not send copied content to a server.
The only automatic request the app makes is a daily update check (from version 0.1.5): it downloads the latest version number and release notes from historr.com. No clipboard content or usage data is included, and you can turn automatic checks off in Preferences. If you choose to submit a review from the app, that review (and the optional name you enter) is sent too.
Sensitive data
Historr ignores copies marked private by password managers. It can also detect sensitive-looking values such as card numbers, one-time codes, and tokens and remove them after a short period.
Quick answers
Is Historr private?
Yes. Historr stores clipboard history locally on your Mac and does not use cloud sync, accounts, or telemetry.
Does Historr upload clipboard history?
No. Historr does not upload clipboard history to Kainolab or any third-party server.
How does Historr handle sensitive clipboard items?
Historr ignores clipboard items marked concealed or transient by password managers, and it can auto-expire card numbers, one-time codes, and token-like values.