Today, at a glance.
Your next date, a quick check-in, and nothing that nags.

Sennight
Sennight is a private diary for people keeping a weekly treatment routine with their clinician’s help.
View on the App StoreSubscription with a free trial. For adults aged 18 and over, in the UK.
One dot, one week
A sennight is an old English word for a week — seven nights. Each week is one dot on your path. Log the day’s entry in seconds, add how you felt if you like, and watch the line of your own story draw itself. Nothing is scored, nothing is judged, and there is no streak to lose.
Your next date, a quick check-in, and nothing that nags.

Log it in two taps. Nothing else is asked of you.

One dot per week. Your weight, drawn gently, if you choose to add it.

Everything you logged, ready for an appointment. It leaves your phone only when you share it.

A reminder on the day and a quiet heads-up the night before. Both optional.

No account. No server. No analytics. Your weeks stay on this iPhone.

A diary, not a medical device
Sennight is a diary, not a medical device. It never advises. It will never suggest what you take, when, or how much; it makes no predictions, sets no targets, calculates no scores, and draws no conclusions from what you record. Decisions about your treatment belong to you and your clinician. If something feels wrong, speak to your prescriber, NHS 111, or 999.
There is no account, no server, and no tracking — your diary lives on your iPhone and we never receive it. No ads, no trackers, nothing to sell. Nobody pays us for your attention: you’re the customer, and that’s the whole business model. App Store privacy label: Data Not Collected.
Sennight is for adults aged 18 and over, in the UK. It is a subscription with a free trial; the price is shown before you pay, and you can cancel any time in your App Store settings. Not affiliated with any pharmaceutical company.
Subscription with a free trial. For adults aged 18 and over, in the UK.