# nightguard vs LinX CGM

The clearest difference is rating: nightguard at 4.5 against LinX CGM's 3.3. nightguard also leads on review sentiment (70% vs 37%) and ratings volume (889 vs 13). LinX CGM's advantage is in-app purchases (none vs 2) and iOS requirement (14.0 vs 17.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. nightguard sells 2 in-app purchases, starting at $1.99 per month. LinX CGM asks for nothing beyond the download.

nightguard holds the better App Store score, 4.5 against 3.3. That said, the two scores are not equally well evidenced: nightguard has 889 ratings behind it against 13, so its average is the more settled of the two. Written reviews point the same way: 70% of nightguard's written reviews are positive against 37% of LinX CGM's.

nightguard ships an update monthly, LinX CGM every 4 weeks. The most recent releases landed on October 26, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | nightguard | LinX CGM |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (889 ratings)](https://appshunter.io/ios/app/nightguard/id1116430352/reviews)** | [3.3 (13 ratings)](https://appshunter.io/ios/app/linx-cgm/id6466264731/reviews) |
| Number of ratings | **889** | 13 |
| Positive reviews | **70.1% of reviews** | 36.8% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Monthly | **Every 4 weeks** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 13 MB | 112 MB |
| Requires iOS | 17.0 | **14.0** |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPod, Apple Watch |
| Age rating | 17+ | 4+ |
| Developer | [SPORTMEO](https://appshunter.io/developer/1769651057) | [Micro Tech Medical (Hangzhou) Co., LTD.](https://appshunter.io/developer/1255039281) |

## What reviewers say

### nightguard

[App page](https://appshunter.io/ios/app/nightguard/id1116430352)

Monitor blood glucose levels from your Nightscout backend. Receive alerts for out-of-range values, track historical data with overlay charts, and tune basal rates with statistics. Optionally sync data to Apple HealthKit.

**Highlights:** Blood glucose value display, Customizable glucose range alerts, Alert snoozing and reactivation, Rapid rise/fall alerts, Historical overlay charts, Basal rate tuning statistics, HealthKit data sync

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Nightguard Pro | $1.99 | per month |
| Nightguard Max Subscription | $3.99 | per month |

**What reviewers like**

- 🚀 Great app for monitoring glucose levels
- 👍 Helpful for managing diabetes
- 🤖 Integrates well with Apple Watch
- 📊 Provides useful data visualization

**What reviewers complain about**

- 🐛 Alarms/notifications not working properly
- 🔄 Inconsistent data sync/refresh issues
- 📱 Apple Watch app crashing/not functioning
- 🔢 Issues with unit conversions (mg/dL vs mmol/L)

**Reported bugs**

- Readings stuck or not updating
- Nightscout URL not recognized
- Glucose data not syncing to Apple Health
- Sudden disappearance of Apple Watch app

**Requested features**

- Add ability to view/scan graph data points
- Improve Apple Watch complication and widget
- Allow custom high/low alert thresholds
- Provide more detailed user manual/documentation


### LinX CGM

[App page](https://appshunter.io/ios/app/linx-cgm/id6466264731)

This app receives and displays glucose concentration values from a continuous glucose monitoring system. It alerts users when blood glucose levels exceed preset limits and helps analyze readings to form reports. Measurements are not for diabetes diagnosis.

**Highlights:** Receive and display glucose concentration, Alerts for high/low blood glucose, Analyze glucose readings, Generate reports, System settings

**Features:** Apple Watch app

**In-app purchases:** none


## Frequently asked questions

### Is nightguard free?

nightguard is free to download, with in-app purchases available.

### Is LinX CGM free?

LinX CGM is free to download, with no in-app purchases.

### Which has better reviews, nightguard or LinX CGM?

nightguard is rated higher. nightguard averages 4.5 out of 5 from 889 ratings, while LinX CGM averages 3.3 from 13 ratings.

### Do nightguard or LinX CGM have ads?

Neither nightguard nor LinX CGM shows ads.

### Which is updated more often, nightguard or LinX CGM?

nightguard ships an update monthly, and LinX CGM every 4 weeks. Most recently, nightguard was updated on October 26, 2026 and LinX CGM on October 27, 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.*