Log glucose, meals and insulin in seconds. No account, no cloud: your diary stays on your phone and so does the PDF you make for your doctor. With or without a diagnosis.
Log a blood sugar reading in seconds and keep glucose, meals, insulin and medication in one private diary. No account, no cloud; every record stays on your phone.
For anyone living with type 1, type 2 or gestational diabetes, keeping an eye on prediabetes, or tracking without a diagnosis. If you have ever written a number on the back of a receipt, this is the notebook you meant to keep.
AN ENTRY IN SECONDS
- Glucose in mg/dL or mmol/L, tagged fasting, pre-meal, post-meal (2h) or bedtime. Open, type, done.
- The insulin you took: your own basal and bolus products; premixed gets its own row. The app never calculates or suggests a dose.
- Pills in one tap, and a daily reminder if you like.
- 1000+ foods with carb counts: scan the barcode, pick a favorite, or add your own and give it an emoji.
- Tap "I started eating" and a 120-minute countdown sits on the dashboard. Started late? It counts what is left.
REVIEW YOUR HISTORY
- A color-coded journal with a daily chart. Edit an entry or swipe to delete; undo waits 5 seconds.
- Insights (Pro): the share of readings inside your target range (time in range), a typical day built from every reading in the period (AGP), an estimate of A1C from your average (GMI), 30 and 90-day trends, a weekly digest.
- Meal response (Pro): the 3-hour curve after a meal, alongside earlier logs of the same food.
- A doctor-ready PDF for any date range, made on the phone, Insights included.
INJECTION SITE ROTATION
- A body map of your logged injections, mirrored so your left is on the left. It marks the spot that has waited the longest, with a short note on how quickly each region typically absorbs.
TRACKING WITHOUT A DIAGNOSIS
- Choose "No diagnosis" at setup and the insulin screens stay hidden. You keep a plain journal of glucose and meals.
- Reference pages from the ADA and CDC are linked inside the app. The app scores nothing; that conversation belongs with your doctor.
STAY ON SCHEDULE
- Up to 10 reminders in one place: glucose, medication, basal, or any you write yourself. Medication can repeat through the day. Pick a ready-made set at setup and see the next 24 hours on one screen.
- On iOS 26, a reminder you set can ring as a real alarm, audible on silent; one tap turns it back into a notification.
- The post-meal timer can ring the same way when it ends, and runs as a Live Activity until then.
- Home and lock screen widgets: last reading, log glucose, a meal or insulin, start the timer. Two Control Center controls on iOS 18.
- Apple Watch: your last reading, colored by your own target band, and a countdown to your next reminder, on your wrist and as a watch face complication.
MORE
- Profiles for yourself and the people you care for; each keeps its own log and reminders.
- Apple Health (Pro) reads glucose into the journal, marked "Health". Write-back of hand-entered readings is off until you turn it on in Settings.
- 9 languages, with full right-to-left layout for Arabic.
Download zerospike, make your first entry in seconds, and walk into your next appointment with a clear log.
zerospike is a personal tracking logbook. It is not medical advice and not a medical device. Always decide treatment with your healthcare team.
Pro plans: monthly, yearly (7-day free trial) or a one-time lifetime purchase.
Privacy Policy: https://greeneyeapp.com/en/legal/zerospike-privacy
Terms of Use (EULA): https://greeneyeapp.com/en/legal/zerospike-terms
Ratings & Reviews
This app hasn’t received enough ratings or reviews to display an overview.
• Injection log is simpler: your insulin product is set once in Settings, not on every entry.
• Health sync is more reliable: readings that could not be written are retried, and Settings shows the last write.
Version 2.3.5
The developer, Muhammed Bozkurt, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Privacy practices may vary, for example, based on the features you use or your age. Learn More
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
Seller
Muhammed Bozkurt
Size
70.9 MB
Category
Health & Fitness
Compatibility
Requires iOS 16.4 or later.
iPhone Requires iOS 16.4 or later.
iPad Requires iPadOS 16.4 or later.
Mac Requires macOS 12.0 or later and a Mac with Apple M1 chip or later.