PeriLog
🌿 Symptom diary
Hot flushes, headaches, fatigue, bloating, cramps — tap to log in seconds, or add your own custom symptoms.
A calm place to track your changing body
PeriLog is a private, on-device tracker for periods, symptoms, mood and sleep through perimenopause. No jargon. No judgement. Just a clearer picture of your own rhythm — and the confidence to bring it to your GP.
Period tracking
Symptom diary
Mood & sleep
On-device privacy
0accounts required
On-devicedata stays private
30+trackable signals
£1.99Premium / mo
No account needed·
Free with ads·
Premium optional·
Optional encrypted backup
Why PeriLog
Everything you track, in one gentle daily check-in
Built for real, messy patterns — not a rigid 28-day calendar.
🩸 Period & cycle tracking
Irregular is normal here. Variable cycle lengths, skipped months and spotting are all supported.
🌙 Sleep, mood & energy
Track restless nights, low moods and energy dips to see how they connect to your cycle.
📊 Gentle insights
Monthly stats and a colour-coded heatmap that only restate what you log. No invented scores.
📷 Photo journal
Add photos to your daily log to track visible changes — skin, bloating and anything else.
📖 Cycle education
Plain-language guides to each cycle phase and how perimenopause affects your body and mood.
🎯 Gentle goals
Small, kind goals — water, movement, rest — that fit into real life, not guilt.
🔒 Private by default
All data stays on your phone. Optional end-to-end encrypted cloud backup — never required.
How it works
Three gentle steps
Download & open
No sign-up, no forms. You'll be tracking within a minute.
Log in seconds
A daily check-in that takes less time than making tea.
See your patterns
Monthly trends that help you understand — and explain — what's happening.
Privacy
Your story stays yours
PeriLog is local-first. Your health data belongs on your phone — and only your phone.
On-device storage. All health data stays in private app storage on your device.
No account needed. Core use is fully offline and anonymous.
Optional encrypted backup. End-to-end encrypted (AES-256-GCM) if you choose cloud backup.
Delete anything, anytime. Clear local data, or request account & backup deletion.
Questions
You might be wondering
Do I need an account to use PeriLog?
No. Core use is fully offline and requires no sign-up. An optional account is only used if you want end-to-end encrypted cloud backup.
Is my health data private?
Yes. Your logs stay in private app storage on your phone. If you turn on cloud backup, data is encrypted on your device before it is uploaded — no one else can read it.
What if I forget my cloud backup password?
Because backups are end-to-end encrypted, a forgotten password cannot be recovered — even by us. This is a deliberate privacy choice, and it's explained in the app before you sign up.
Can I export or delete my data?
Yes. You can export a PDF or JSON copy anytime, clear all logs in Settings, or use our data deletion page for account and cloud-backup deletion (within 30 days).
Is PeriLog medical advice?
No. PeriLog is a personal tracking and information tool, not a medical device, and does not diagnose or treat anything. Always talk to a qualified healthcare professional about your health.
Start feeling more in tune with your body today
Private, calm and kind — tracking that fits into your life.