# Blood Sugar Diary - zerospike — Glucose, insulin & carb log

> Glucose, insulin & carb log (iPhone/iPad app by Muhammed Bozkurt.)

- Source: https://appshunter.io/ios/app/blood-sugar-diary-zerospike/id6778782351 (this page in markdown: same URL + `.md`)
- Developer: [Muhammed Bozkurt](https://appshunter.io/developer/1808955530)
- Category: Health & Fitness, Utilities
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 16.4 · 67 MB
- Languages: American English, Arabic, French (France), German (Germany), Italian, Japanese, European Portuguese, European Spanish, Turkish
- Released: 2026-06-17
- Data updated: 2026-10-14

## What is Blood Sugar Diary?

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

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| zerospike Pro Monthly | $4.99 | per month |
| zerospike Pro Annual | $29.99 | per year |
| zerospike Pro Annual | $29.99 | per year |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| zerospike Pro Lifetime | $79.99 | one-time |


## Is Blood Sugar Diary safe?

Not enough ratings yet to assess Blood Sugar Diary.

## Is Blood Sugar Diary legit?

Blood Sugar Diary - zerospike appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for Blood Sugar Diary is 65 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 5 releases)

### 2.3.7 — 2026-10-11

- 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

### 2.3.5 — 2026-09-10

• 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.

### 2.3.4 — 2026-09-08

Minor improvements and fixes under the hood.

### 2.3.3 — 2026-09-05

- Home ring shows today's average; latest reading sits below it
- Active insulin counts fast-acting only; basal gets a status line and one-tap log
- Basal reminder: confirm, pick a site, log with profile units; notification has a "Done" button
- Carb ratio shows in the meal tab and meal entry, tap to edit
- Meal entry dose no longer fills itself in; reference lines stay, you enter it
- 250+ new foods across eight cuisines with portion presets; search Open Food Facts by name

### 2.3.2 — 2026-09-02

- Setup is rebuilt: clearer questions, larger controls, a calmer flow
- Reminders arrive with a short title and their own name in the text, so a long name is no longer cut off
- On tablets, sheets and dialogs are centred at a readable width and the add button no longer sits over the journal
- Injection map: the buttock sites are now in a row across the upper area
- mmol/L no longer overflows the number field
- Pro screens are simpler: one headline, benefits at a glance, one button

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All apps by Muhammed Bozkurt: https://appshunter.io/developer/1808955530

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-14.*