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

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

- Source: https://appshunter.io/ios/app/zerospike-blood-sugar-diary/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 · 68 MB
- Languages: American English, Arabic, French (France), German (Germany), Italian, Japanese, European Portuguese, European Spanish, Turkish
- Released: 2026-06-17
- Data updated: 2026-09-10
- User reviews in markdown: https://appshunter.io/ios/app/zerospike-blood-sugar-diary/id6778782351/reviews.md

## What is zerospike?

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

## 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 |



## Version history (last 5 releases)

### 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

### 2.3.1 — 2026-08-27

- Post-meal timer card is simpler, and telling the app you started eating earlier now happens in one place
- Setup can record the basal and bolus insulin you use, with your own daily basal amount; premixed insulin has its own row and the injection screen brings the product pre-filled
- Journal: swipe an entry to delete it, or delete it from its edit screen; all four kinds, both ask first, and undo stays for 5 seconds
- Apple Health: imported readings now carry the source Health only, and no longer get a period tag the app guessed from the clock; a reading you already logged by hand is no longer imported twice
- New lock screen widgets: last reading, log glucose, log a meal, log insulin, start the post-meal timer; plus two Control Center controls on iOS 18
- The app asks once before you save a second entry of the same kind within a short time, and before an entry dated ahead of now
- Alarm permission can now be turned back on from Settings if you declined it
- Fixes and improvements

## Apps similar to zerospike

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## More apps by Muhammed Bozkurt

- [SoulLens: AI Face Analyzer](https://appshunter.io/ios/app/soullens-ai-face-analyzer/id6744700178)
- [Combina](https://appshunter.io/ios/app/combina/id6747253602)
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- [Faunade: Merge Animal Puzzle](https://appshunter.io/ios/app/faunade-merge-animal-puzzle/id6784629077)

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 2026-09-10.*