nightguard vs LinX CGM
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
nightguard
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.
- 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
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Disclaimer! Don't use this App for medical decisions. It comes with absolutely no warranty. Use it at your own risk! You can use nightguard to submit your bg values to the Apple HealthKit. This is disabled by default but can be enabled in the nightguard app. Nightguard is an app that displays your blood glucose values from the Nightscout backend. It is a native iOS App with support for the Apple Watch. Features are: - Define a range of acceptable blood glucose values. - Whenever your values are out of range you will be alerted. - You can snooze the alerts all the time and for a defined time period. - You can reactivate the alerts all the time. - You can activate alerts if the values are rising or falling too fast. - The app displays yesterdays values as an overlay chart. This way you have a hint about how your values could behave in the future. - Tune your basal rates with the statistics function to overlay different days - Sync your bg values to HealthKit (optional) For the alarms to work the app has to be active. So you can enable a screen lock that keeps the app running all night long. Have a look at www.nightscout.info for more information about how to setup your own Nightscout backend.
LinX CGM
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.
- Receive and display glucose concentration
- Alerts for high/low blood glucose
- Analyze glucose readings
- Generate reports
- System settings
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Lin X is an application available on your phone used to receive and display the glucose concentration value and remind when the blood glucose value exceeds the upper or lower limit of the preset blood glucose value. It also has system Settings and other functions to help users analyze and evaluate the glucose reading of the continuous glucose monitoring system and form a report. Measurements displayed on Lin X cannot be used for the diagnosis or screening of diabetes. The app is intended for informational use only and is not a substitute for professional medical advice. Always seek the advice of your doctor or other qualified health provider with any questions you may have regarding a medical condition. Note: The compatible medical hardware is certified and available for use in the following countries/regions: European Union (EU). Disclaimer: Lin X is designed to support, not replace, professional medical care. Always consult your doctor or a qualified healthcare provider before making any medical decisions based on the information provided by this app. The app and its developers are not responsible for any health-related outcomes resulting from the use of or reliance on the data displayed.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | nightguard | LinX CGM |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (889 ratings) — better | 3.3 (13 ratings) |
| Positive reviews | 70.1% of reviews — better | 36.8% of reviews |
| Number of ratings | 889 — better | 13 |
| Update frequency | Monthly | Every 4 weeks — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPod, Apple Watch |
| Requires iOS | 17.0 | 14.0 — better |
| Further details — not scored | ||
| Size | 13 MB | 112 MB |
| Age rating | 17+ | 4+ |
| Developer | SPORTMEO | Micro Tech Medical (Hangzhou) Co., LTD. |
Customer experience
nightguard
LinX CGM
Bugs and requests
nightguard
Reported bugs
4 issues- Readings stuck or not updating
- Nightscout URL not recognized
- Glucose data not syncing to Apple Health
- Sudden disappearance of Apple Watch app
Requested features
4 requests- 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
Not enough reviews yet to summarise bugs or requests.
In-app purchases
nightguard
- Nightguard Pro$1.991 Month
- Nightguard Max Subscription$3.991 Month
LinX CGM
No in-app purchases









