# nightguard vs FLwatch

The clearest difference is update cadence: FLwatch at weekly against nightguard's every 2 months. FLwatch also leads on monetization model (free vs free with in-app purchases) and review sentiment (87% vs 70%). nightguard's advantage is ratings volume (833 vs 34) and device support (4 vs 2). On price, rating, ads and in-app purchases there is nothing between them.

Both are free to download. nightguard sells 2 in-app purchases, starting at $1.99 per month and FLwatch sells 4 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

FLwatch holds the better App Store score, 4.6 against 4.4. That said, the two scores are not equally well evidenced: nightguard has 833 ratings behind it against 34, 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 87% of FLwatch's.

nightguard ships an update every 2 months, FLwatch weekly. The most recent releases landed on September 24, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | nightguard | FLwatch |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.4 (833 ratings)](https://appshunter.io/ios/app/nightguard/id1116430352/reviews) | **[4.6 (34 ratings)](https://appshunter.io/ios/app/flwatch-glucose-sensor-graph/id6670172928/reviews)** |
| Number of ratings | **833** | 34 |
| Positive reviews | 70.3% of reviews | **87.2% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Weekly** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 11 MB | 21 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, Apple Watch |
| Age rating | 17+ | 17+ |
| Developer | [SPORTMEO](https://appshunter.io/developer/1769651057) | [Philipp Poeml](https://appshunter.io/developer/1541497053) |

## 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


### FLwatch

[App page](https://appshunter.io/ios/app/flwatch-glucose-sensor-graph/id6670172928)

Visualize blood glucose readings from compatible sensors on your iPhone and Apple Watch. Track insulin doses, view insulin-on-board and activity graphs, and integrate data with Apple Health for comprehensive diabetes management.

**Highlights:** Blood glucose graph on iPhone and Apple Watch, Insulin on Board (IOB) calculation, Insulin activity graph, iOS Home Screen and Lock Screen widgets, Live Activities for quick glucose updates, CarPlay support, Export to Apple Health

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Some good coffee beans | $4.99 | one-time |
| Some more good coffee beans | $9.99 | one-time |
| Many good quality coffee beans | $24.99 | one-time |
| Lots good quality coffee beans | $49.99 | one-time |


## Frequently asked questions

### Is nightguard free?

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

### Is FLwatch free?

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

### Which has better reviews, nightguard or FLwatch?

FLwatch is rated higher. nightguard averages 4.4 out of 5 from 833 ratings, while FLwatch averages 4.6 from 34 ratings.

### Do nightguard or FLwatch have ads?

Neither nightguard nor FLwatch shows ads.

### Which is updated more often, nightguard or FLwatch?

nightguard ships an update every 2 months, and FLwatch weekly. Most recently, nightguard was updated on September 24, 2026 and FLwatch on September 22, 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.*