Blood Sugar Diary - zerospike

Glucose, insulin & carb log

Free · In‑App Purchases · Designed for iPad. Not verified for macOS.

Log glucose, meals and insulin in seconds, no account: your diary is stored on your phone. New: Spike describes your last 14 days if you turn it on. Not medical advice. Log a blood sugar reading in seconds and keep glucose, meals, insulin and medication in one private diary. No account needed: your entries are stored on your phone. For anyone living with type 1, type 2 or gestational diabetes, keeping an eye on prediabetes, or logging with no diabetes type at all. AN ENTRY IN SECONDS - Glucose in mg/dL or mmol/L, tagged fasting, pre-meal, post-meal (2h) or bedtime. - The insulin you took: your own basal and bolus products, premixed on its own row. You type the units; the app keeps the record. - Pills in one tap, with a daily reminder if you like. - 1000+ foods with carb counts: scan a barcode, pick a favorite or add your own. - Tap "I started eating" and a 120-minute countdown starts on the dashboard. Started late? It counts what is left. REVIEW YOUR HISTORY - A color-coded journal with a daily chart. Edit or swipe to delete, with undo. - Insights (Pro): time in range, a typical day from all your readings (AGP), an A1C estimate from your average (GMI), 30 and 90-day views and a weekly digest. A 7-day view is free. - Meal response (Pro): the 3-hour curve after a meal, next to earlier logs of the same food. - A doctor-ready PDF for any date range (Pro), made on the phone. SPIKE, YOUR IN-APP ASSISTANT (OPTIONAL) - Ask about diabetes in general or about the app. Answers stream in, with sources and quick actions. - If you turn it on, Spike can describe a summary of your last 14 days. It is computed on your phone, sent only with your questions and not stored on our server. - Spike does not give medical advice. A few questions a day are free; Pro raises the limit. INJECTION SITE ROTATION - A mirrored body map of your logged injections, with notes on how quickly each region typically absorbs. With Pro, it marks the spot unused the longest. SIMPLE VIEW - No diabetes type to pick? Choose that option at setup and the insulin screens stay hidden: a plain journal of glucose and meals. ADA and CDC reference pages are linked; the app scores nothing. STAY ON SCHEDULE - Up to 10 reminders for glucose, medication, basal or your own text, with a ready-made set at setup. - On iOS 26, a reminder you set can ring out loud, even on silent, and so can the post-meal timer; one tap turns it back into a notification. - Live Activity, home and lock screen widgets, and two Control Center controls on iOS 18: see the last reading, log in one tap, start the timer. - Apple Watch: your last reading in your own target colors and a countdown to the next reminder, also as a complication. MORE - Extra profiles for the people you care for (Pro), each with its own log and reminders. - Apple Health: writing hand-entered readings is free, only with your permission; importing glucose is Pro. - 9 languages, with full right-to-left layout for Arabic. - Privacy: usage analytics are optional and off by default. They use a random install ID, never your name or e-mail. Turn them on or off in Settings. PRO AND THE FREE TRIAL Pro is a monthly or yearly subscription, or a one-time lifetime purchase. The yearly plan starts with a 7-day free trial for new subscribers: cancel at least 24 hours before the trial ends to avoid the charge. Subscriptions renew automatically unless cancelled at least 24 hours before the period ends; cancel anytime in your Apple Account settings. Download zerospike, make your first entry today, and try Pro free for 7 days when you want the long view. zerospike is a personal tracking logbook. It is not medical advice and not a medical device. Decisions about your care stay with your healthcare team. Privacy Policy: https://greeneyeapp.com/en/legal/zerospike-privacy Terms of Use (EULA): https://greeneyeapp.com/en/legal/zerospike-terms

  • This app hasn’t received enough ratings or reviews to display an overview.

- Spike can describe a summary of your own last 14 days, only if you turn it on. Not medical advice. - Spike's answers appear as they are written, with quick actions and sources - New Pro welcome steps, and a counter for the days left in your trial - Shorter setup: meal log settings are asked when you first need them - Your Pro status refreshes when you return to the app - Usage analytics are optional and off by default; turn them on or off in Settings

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 Linked to You

    The following data may be collected and linked to your identity:

    • Health & Fitness
    • Purchases
    • Identifiers
    • Usage Data
    • Diagnostics
  • Data Not Linked to You

    The following data may be collected but it is not linked to your identity:

    • User Content
    • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More

The developer has not yet indicated which accessibility features this app supports. Learn More

Seller
Muhammed Bozkurt
Size
70 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.
  • Apple Vision
    Requires visionOS 1.0 or later.
  • Apple Watch
    Requires watchOS 11.0 or later.
Languages
English and 8 more
  • English, Arabic, French, German, Italian, Japanese, Portuguese, Spanish, Turkish
Age Rating
4+
In-App Purchases
Yes
  • zerospike Pro Annual $29.99
  • zerospike Pro Annual $29.99
  • zerospike Pro Lifetime $79.99
  • zerospike Pro Monthly $4.99
Copyright
© 2026 greeneyeapp