
zerospike: Diabetes Log
Glucose, insulin & meal log
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Free
In-App Purchases
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About
zerospike is a private logbook for people living with diabetes. Record glucose, meals and insulin in one place. No account needed; your health records stay on your device.
LOG IN SECONDS
- Record glucose in mg/dL or mmol/L with period tags: fasting, pre-meal, post-meal (2h) and bedtime
- Log insulin doses and meals in a few taps
- Food database of 500+ items with barcode scanning, carb counts, quick add and favorites
- Tap "I started eating" to start a post-meal timer, shown live on your dashboard
REVIEW YOUR HISTORY
- Color-coded journal and a daily chart
- Insights (Pro): time in range, ambulatory glucose profile (AGP), estimated A1C (GMI), plus 30 and 90 day trends and a weekly digest
- Doctor-ready PDF report for any date range you choose
- Meal response: see the 3-hour course after a meal; compare with past attempts of the same food (Pro)
INJECTION SITE ROTATION
- A body map of the injections you have logged
- See the point you have not used for the longest time
- Neutral notes on typical absorption speed by body region
STAY ON ROUTINE
- Post-meal countdown on the iOS Live Activity, plus a home-screen and lock-screen widget that shows your last reading and next reminder
- Apple Watch: last reading and the post-meal timer, with watch-face complications
- Reminders at times you choose
MORE
- Multiple profiles for caregivers and family
- Apple Health (Pro): read your glucose readings into the journal; optionally write what you log back to Health
- Available in Turkish, English, German, Spanish and French
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
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What's New in zerospike
1.6.1
August 13, 2026
You now pick the time when logging an injection, and insulin type sits above the dose. Choosing bolus lets you mark it as Before meal or Correction. Basal fills in the amount saved in Settings. Active insulin is estimated from the insulin you select in Settings. The injection site map is back: one silhouette, darker where you inject more, tap to zoom. Fixed the Food tab going blank while scrolling, and screens no longer jump while loading.
MoreSubscription plans
zerospike Pro Monthly
Full access to all features monthly
$4.991 Month
1
In-App Purchases
$79.99
zerospike Pro Lifetime
Full access to all features forever






