# zDrip Guard vs NightKnight Glucose Tracker

The clearest difference is iOS requirement: zDrip Guard at 15.6 against NightKnight Glucose Tracker's 17.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

zDrip Guard ships an update every 8 days, NightKnight Glucose Tracker every 5 days. The most recent releases landed on November 5, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | zDrip Guard | NightKnight Glucose Tracker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/zdrip-guard/id6744721821/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 8 days | **Every 5 days** |
| Monetization | Free | — |
| Size | 190 MB | 4 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | iPhone, iPod, Apple Watch | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [承瑛 朱](https://appshunter.io/developer/1465227294) | [FERGUS COONEY](https://appshunter.io/developer/6775220541) |

## What reviewers say

### zDrip Guard

[App page](https://appshunter.io/ios/app/zdrip-guard/id6744721821)

Monitor blood glucose levels in real-time from a Nightscout backend. Receive personalized trend alerts for high or low glucose readings on your smartphone or smartwatch. Sync data to HealthKit for comprehensive health tracking.

**Highlights:** Real-time glucose readings, Personalized trend alerts, Apple Watch app integration, HealthKit data sync, Customizable alert sounds and schedules, Glucose trend graph on watch

**Features:** macOS Compatibility

**In-app purchases:** none


### NightKnight Glucose Tracker

[App page](https://appshunter.io/ios/app/nightknight-glucose-tracker/id6784815820)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is zDrip Guard free?

zDrip Guard is free to download, with no in-app purchases.

### Is NightKnight Glucose Tracker free?

NightKnight Glucose Tracker is free to download, with no in-app purchases.

### Do zDrip Guard or NightKnight Glucose Tracker have ads?

Neither zDrip Guard nor NightKnight Glucose Tracker shows ads.

### Which is updated more often, zDrip Guard or NightKnight Glucose Tracker?

zDrip Guard ships an update every 8 days, and NightKnight Glucose Tracker every 5 days. Most recently, zDrip Guard was updated on November 5, 2026 and NightKnight Glucose Tracker on October 28, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*