LedgerBook
Download

How to install

Installing LedgerBook

Four steps, about two minutes. Your phone will show two warnings along the way and both are expected — they appear for every app that does not come from the Play Store, not because of anything about this one.

Open the releases page

  1. 1Download the fileWarning
  2. 2Open itWarning
  3. 3Install
  4. 4Set your PIN

1Download the file

Tap the download button. Chrome may say the file "may be harmful" — it says that about every APK. Choose Download anyway.

Expected warning 1 of 2

Chrome says this about every APK. Choose Download anyway.

2Open it

Open the downloaded file. Android says this source is not allowed to install apps yet. Tap Settings — not Cancel — and turn on Allow from this source. The install carries on by itself from there.

Expected warning 2 of 2

Tap Settings on this one — not Cancel.
Turn on Allow from this source. The install goes on from here.

3Install

Tap Install. Play Protect then says it has not seen this app before and offers to scan it — choose Scan app. It takes about a minute and comes back with This app looks safe, and then you tap Install again.

aTap Install

Tap Install.

bChoose Scan app

Play Protect has not seen it before. Choose Scan app.

cTap Install again

What the scan came back with. Tap Install.

4Set your PIN

No sign-inNo accountPIN never leaves the phone

Open LedgerBook. It asks what to call you, then how you would like to type your PIN — Number Pad or Keyboard — then for a four-digit PIN, typed twice. The PIN stays on this phone and is never copied — not even into a backup. There is nowhere to sign in to and no account to make.

aTell it your name

It asks what to call you. You can change this anytime in Settings.

bCreate your PIN

Four digits. Step 2 of 3.

cConfirm your PIN

The same four digits again. The PIN is never copied anywhere.

That’s it — the app is ready to use.

Optional

Checking you got the right file

Every release publishes the fingerprint of its own file. If the number your phone computes matches the one below, the file is byte for byte the one that was published. This is optional — most people skip it.

SHA-256SHA-256