Dono Log: know at a glance when you can give blood again
Studio Nidello launches an App Store log for blood, plasma and platelet donations. It works out the next possible date under each donor's own blood service rules, travel included.
Canada, November 3, 2026. Studio Nidello today announced Dono Log for iPhone, iPad and Apple Watch. Donors log their donations; the app shows the first date they can give again, and the rule it applied to get there.
The problem
Regular donors keep asking the same question: I gave in March, so when can I give again? The answer depends on the donation type, the blood service, donations of another type, yearly limits and travel over the past three years. Often, donors only find out at the clinic questionnaire, after a wasted trip.
What Dono Log does
- The next date, worked out for whole blood, plasma and platelets, including the gaps between types and 12-month limits.
- The trips that matter: the app knows 815 regional subdivisions and flags ahead of time the stays the questionnaire will pick up (malaria, mosquito-borne viruses, Chagas). Trips logged in Cartina, the studio's travel app, come in on their own.
- Temporary deferrals: a tattoo, dental work, a vaccine or a medication pushes the date back to the end the clinic gave.
- The donor card: from a photo, the app reads the number, blood type and barcode. The blood type can also come from the Health app, read-only.
- History without retyping: screenshots of the blood service's online record are enough.
- Reminders and appointments: a reminder on the day you become eligible again, and the appointment added to your calendar.
- On the watch and Home Screen: the countdown to the next donation, and "I gave today" right from Apple Watch. Siri can also tell you the next donation date.
- No network needed: the calculation, travel criteria and card all work offline.
Each blood service's own rules
Dono Log applies the published criteria of five blood services: Héma-Québec, Canadian Blood Services, the American Red Cross, Établissement français du sang and NHS Blood and Transplant. The app picks the service from the region, and each keeps its own intervals. Elsewhere, intervals can be set by hand.
"A loyal donor should never make a wasted trip. Dono Log tells them when they can give again, and why, before they even book." — Daniel, founder of Studio Nidello
Your data stays yours
No account, no Dono Log server, no ads, no analytics. Donations stay on the device or in the user's own iCloud, and can be exported at any time as CSV or JSON. Dono Log is a personal log: it gives no medical advice, is not affiliated with any blood service, and the blood service always decides on donation day.
Availability
Dono Log is available now on the App Store for iPhone, iPad and Apple Watch (iOS 26), for CA$4.99, with no subscription and no in-app purchase. Interface in 13 languages.
App Store: https://apps.apple.com/app/id6814256970
Website: https://nidello.ca/dono-log
About Studio Nidello
Nidello is an independent studio making simple, private, carefully built iPhone and iPad apps, with no ads and no tracking.
Press contact: Nidello, [email protected]
###