Halftab
Know what's active.
Know what's left.
Halftab is a calm dose tracker for ADHD medication. Log half a tab in two taps, check in on how you feel, watch each dose peak and fade, and see what's left, today and in the bottle.
iPhone and iPad: coming soon
On iPhone? One email when Halftab is on the App Store, then a new guide a few times a year. Unsubscribe anytime.
No account. No ads. Your data stays on your device and in your own iCloud or Google backup.
Split tabs
Quarter, half, three-quarters, or one and a half. The milligrams follow, so your daily total is always right.
See what's active
Every dose glows along a sun arc that follows the day, or, with Plus, as a ring on a 24-hour clock. Tap any dose to see when it begins to wear off.
How are you feeling right now?
Check in any time. Quick picks for tired, jittery, focused, anxious, calm, and headache, or the full list by category. Each one is time-stamped against your doses.
Insights that grow with you
Every check-in lands on the dose curve. Halftab finds patterns in your own logs: when jittery hits, whether tired comes before the estimated wear-off, late doses and sleep, half tabs versus full, caffeine days. Each card says how much data it rests on.
A report for your doctor
A one-page monthly PDF of prescriptions, doses, how the month felt, patterns worth discussing, notes, and pickups. Share it before an appointment.
Never run out
Log each pharmacy pickup. Doses count down what's on hand, and a week before the month is up, Halftab flags the day to request a refill.
Estimated timing, tuned to you
Optional estimates for when a dose kicks in, wears off, and clears for sleep. Tell Halftab if you metabolize fast or slow, dose with a meal, or eat a lot of acidic food, and they shift to match.
Every ADHD medication
38 products with every strength and illustrated pill artwork, from Adderall and Vyvanse to Concerta and Strattera. Anything else, add your own.
Free to start. Plus when you want more.
- One prescription
- Unlimited dose logging, split tabs and notes included
- Check-ins, with optional "How's it landing?" prompts
- Sun arc timeline
- Supply tracking and refill reminders
- Daily totals and history calendar
- Private backup to your own iCloud or Google account
- Everything in Free
- Unlimited prescriptions
- Insights from your check-ins and doses
- Report for a doctor, monthly PDF
- Rings timeline
- Timing estimates that learn from your check-ins
- Dose reminders
- Dark mode
Plus is an auto-renewing subscription billed through Google Play or your Apple ID. Cancel anytime in Google Play or iOS Settings. Your logged data is yours, period. Nothing is stored or deleted until you choose to, and you can easily erase everything with one tap in Settings.
Halftab is a logging tool, not medical advice. Timing estimates are approximations for typical release profiles and vary by person. Insights describe your own logs and are computed on your device. Take medication only as prescribed by your clinician.