DiaryCBT — A private, offline CBT journal

What's inside

Journal, reframe, and notice patterns

Simple tools grounded in CBT, with everything kept on your device.

A quick journal

Capture what's on your mind in a quick note, tag it, and rate your mood — as often or as rarely as you like.

Reframe a thought

A guided, seven-step thought record helps you catch an automatic thought, spot common thinking traps, weigh the evidence, and land on a more balanced view — with a before-and-after mood check so you can see the shift.

Track your mood

A one-tap daily check-in, a weekly view on your home screen, a colour-coded mood calendar and a 30-day trend so you can spot patterns over time.

Zero permissions, ever

DiaryCBT requests no permissions at all — no internet, no camera, no microphone — so your data physically can't be transmitted. No account, no ads, no third parties.

Encrypted & lockable

Entries are encrypted on-device with SQLCipher (AES-256), and you can add an optional PIN lock for extra peace of mind.

Yours to export

Back up and restore your journal as a JSON file whenever you want — no lock-in, no cloud required.

A quiet place to think.

Free, offline, and entirely private. No account needed.

Get it onGoogle Play

DiaryCBT provides self-help journaling and CBT exercises for general wellbeing. It does not provide medical advice, diagnosis or treatment and is not a replacement for a qualified professional. If you are in crisis, please contact your local emergency services or a crisis hotline.