v0.6.0Download
01Spec
One app, two systems. A Tidemark Pro key works on up to 3 devices, Windows or Mac.
available now
v0.6.0 · 19 October 2026
coming soon
not released yet
Tidemark for Mac is a native app with the same features as on Windows, apart from a few that only exist on one system, plus a menu bar extra, Quick Look, a sunburst view and APFS-aware cleanup. There is no download until it is released. If you buy Tidemark Pro now, the same key will work on your Mac.
coming soon for macOS
Get Tidemark Pro now02Install
Get it from the Microsoft Store
Open the Store listing and choose Get. The Store installs Tidemark and keeps it up to date.
Open Tidemark
Find it in the Start menu. The Overview reads your drives straight away; no account, no sign-in.
Scan a drive
Choose Scan on a drive, or open Explore. The first scan of C: usually takes a minute or two.
Optional: activate Pro
Buy Tidemark Pro, then paste the key from your email into Settings › Tidemark Pro.
03Permissions
The Store shows these as the app’s capabilities. Here is what each one is used for.
3.1
Full trust
Tidemark is a desktop app, so it can measure folders on every drive and read the list of installed programs.
3.2
Administrator, only when you ask
Fast scan, cleaning Windows’ own space with Microsoft’s tools and uninstalling a program installed for all users show a Windows permission prompt each time.
3.3
Real cleanups under AppData
Tidemark turns off the Store’s file virtualization, so clearing another app’s cache under AppData frees real space instead of a private copy.
3.4
Optional scheduled tasks
Daily snapshots and the hourly check are per-user scheduled tasks you turn on yourself. No services and no drivers.
04Uninstall
If you turned on daily snapshots or the hourly check, turn them off first so their scheduled tasks are removed. Then open Settings › Apps › Installed apps, find Tidemark and choose Uninstall. Your history and saved scans stay in %LOCALAPPDATA%\in.thryveapps.tidemark until you delete that folder.
If you use Tidemark Pro, deactivate the PC in Settings › Tidemark Pro first, so the activation can be used on another device.
05Questions
Windows 10 version 2004 (build 19041) or later, and Windows 11, on x64 PCs. Fast scan needs a drive formatted as NTFS, which is the default for Windows drives.
It is coming soon. Tidemark for Mac is a native app for macOS 15 or later, with the same features as on Windows apart from the few that only make sense on one system. It is not released yet. A Tidemark Pro key will work on it too: one key covers up to 3 devices at a time, in any mix of Windows PCs and Macs.
On Windows, from the Microsoft Store, which signs and updates it; the download page links to the listing. The Mac version will be on the download page when it is released.
Only if you turn it on. On Windows, daily snapshots and the hourly check are optional per-user scheduled tasks that take a few seconds and show no window. Tidemark installs no services and no drivers.
Only for three things you start yourself: Fast scan (reading the Master File Table needs it), cleaning Windows’ system space with Microsoft’s tools, and uninstalling a program installed for all users. Tidemark never asks for it on its own.
On Windows, in %LOCALAPPDATA%\in.thryveapps.tidemark: the history database, remembered scans and a log. Uninstalling Tidemark from Windows removes the app; you can delete that folder to remove its data too. The Mac version will keep its data in ~/Library/Application Support/Tidemark and its log in ~/Library/Logs/Tidemark.
→Get Tidemark
Free to use, with no time limit. Tidemark Pro is $9.99 once (usually $19.99), for up to 3 devices, Windows or Mac.
Windows 10 (version 2004, build 19041) or later and Windows 11, on x64 PCs.
Mac, coming soon: macOS 15 Sequoia or later.
