BoulderGradeLog — a logbook that stays in your pocket
Last updated 10 September 2026Your grades are compared with your own and nobody else's, because nobody else's are here.
Every conversion table is written into the build. It works at a crag with no signal, which is where you need it.
The Android package requests no permissions at all — internet included.
BoulderGradeLog collects nothing. Your logbook is written to this phone, read back from this phone, and goes no further. There is no server behind the app, no account attached to it, and no analytics inside it. Uninstall it and the logbook goes with it — we have no copy to hand back.
This is a notebook with arithmetic in it. It knows nothing about your fingers, your shoulders or your training history, and nothing in it should be read as advice about any of them. Climbing hurts people; a pyramid on a phone will not tell you when to stop.
None. No personal information is gathered, transmitted or stored on any system we run. We do not know that you installed the app, we do not know what you climb, and we could not look it up if we tried.
All of this sits in the app's private storage area, which other apps on the phone cannot read:
None of it identifies anybody, and none of it leaves the device. Sessions, pyramids, streaks and venue lists are not stored at all — they are worked out from the climbs above whenever a screen asks for them.
A climb is filed as a rung on a ladder, never as the text "6B+". That is a privacy-neutral detail with a useful consequence: switching the app from Fontainebleau to the V-scale relabels your entire logbook and moves not one entry, because nothing on disk ever depended on the label.
It also means the conversion tables can be corrected in a later version without rewriting anybody's history.
Only to draw the screens in front of you: to group climbs into sessions, to fill the pyramid, to spread your sends across the grades, and to count the weeks you have climbed in. All of it happens on the phone, in the moment you look at it.
The Android package declares no permissions whatsoever. It cannot reach the internet, use the camera, see your location or touch your photos, because it never asks to. On iOS it requests nothing beyond what the system grants any app by default.
Two consequences worth saying plainly. The app cannot remind you to log a session, because sending a notification needs a permission it does not have. And it cannot record where a crag is — a venue is a name you typed, not a location it read.
There is no networking code in the build. No telemetry, no crash reporting, no advertising, no remote configuration, no update check. The one exception is the share sheet: tapping "Share BoulderGradeLog" opens the operating system's own sharing screen with a line of text about the app and your send count. Your logbook does not go with it.
Nothing is shared, sold or handed to anyone, because nothing is collected to share. No third-party service receives data from this app, and there are no analytics or advertising partners in it.
A climb stays on the device until you take it out. Deleting one removes it from the logbook, the charts and the pyramid at the same moment — and if it was holding up a grade, that grade stops being consolidated. Settings has a second button that empties the whole logbook; both ask first, and neither has an undo.
Uninstalling removes everything. Because there is no backup on our side, that is final. If your logbook matters to you, take your own copy before you change phones.
The app is not directed at children under 13 and gathers no information from anyone at any age. There is no account, no profile, no chat and nothing to buy, so there is no way for it to learn anything about whoever is using it.
If this policy changes, the revised version appears on this page with a new date at the top. Since the app collects nothing, any change is far more likely to be a clarification than a new practice.
Questions about this policy or the app can go to [email protected]. Please note we cannot look up or restore anybody's logbook — we have no access to it.