FLwatch Reviews: Is It Legit?

Customer Experience

Positive experience82.2% of reviews
Neutral11.1% of reviews
Negative experience6.7% of reviews

~ Based on 45 written reviews from the US App Store.

Is FLwatch Safe?

FLwatch: Glucose Sensor Graph appears safe based on user ratings. AppsHunter Safety Score for FLwatch is 86/100.

This assessment is based on 41 user ratings, with an App Store average of 4.7/5.

Safety Analysis

89.5% of ratings point to a safe experience
7.9% of ratings suggest some concerns
2.6% of ratings point to a risky experience

~ Based on 38 App Store ratings for FLwatch.

Is FLwatch Legit?

FLwatch: Glucose Sensor Graph appears to be a legitimate app. AppsHunter Legitimacy Score for FLwatch is 83/100.

Based on 83 of 100 points across 7 verification signals from App Store and developer data.

Top reviews

Looking Forward to Trying

Wondering when LibreLinkUp 5.x api will work with FLwatch?

Großartig

Spät entdeckte kleine App, aber schon nach Tagen dankbare Erleichterung, IOB auf einen Blick auf Watch oder Lockscreen, schönes Feature bei der Insulineingabe: time since, dadurch deutlich weniger Kopfrechnen, überhaupt insgesamt weniger mental load. Anbindung an Apple Health vorhanden. Man möchte die App nehmen und den Sensorherstellern hinlegen und sagen: so ihr Holzköpfe, so so so könnte und müsste das sein. Ich verwende sie zusammen mit der umständlichen und unzureichenden Libre App, weil ich dort die Notizen als Kontext und Datenbank der letzten hundert Jahre nutze. Es entsteht zwar etwas Redundanz, aber insgesamt ist mein medizinisch hinreichend kompliziertes Leben seitdem deutlich einfacher. Danke!
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Response from developer

Vielen Dank für die fünf Sterne und die lieben Worte! Den Insulin- und Kohlenhydratrechner habe ich tatsächlich entwickelt, um mir selbst das Kopfrechnen zu erleichtern. Die „Zeit seit“-Anzeige ist von meinem Smartpen inspiriert, der die Zeit seit der letzten Injektion anzeigt. Schön, dass diese kleinen Alltagshilfen auch dir das Leben leichter machen!

Leider keine anpassbare Skala

Würde mir wünschen, dass man die Skala anpassen kann 🤷🏻‍♀️

Response from developer

Danke für dein Feedback! Meinst du die Zeitachse oder die Skala der Glukosewerte? Schreib mir gerne per Support-E-Mail, was du anpassen möchtest und in welcher Situation dir das helfen würde. So kann ich deinen Wunsch besser verstehen – oder prüfen, ob die Darstellung vielleicht nicht wie vorgesehen funktioniert.

Intrusive

This app is perfect, really perfect, but intrusive. The phone shows it all the time in the Dynamic Island, and on the watch it’s pinned as a widget and can’t be removed. The Apple Watch shows it active on the top all the time. It’s giving me stress to see it everywhere. Unfortunately, I removed it from my watch :(
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Top Ergänzung

Eine super Sache. Über Libre LinkUp verbunden. Live Activity auf dem Sperrbildschirm des iPhones und im Smart Stack der Watch aktualisiert sich alle 2 Minuten. Dazu in FLWatch Live Activities aktivieren (vergesst Widgets) sowie Bluetooth Heartbeat aktivieren und mit dem Sensor verbinden wie beschrieben. FLWatch muss im Betrieb im Hintergrund offen bleiben, wie auch die Libre App. Der Batterieverbrauch hält sich in Grenzen, notfalls nachts den iPhone Stromsparmodus aktivieren, FLWatch läuft weiter. Sehr gut!
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Response from developer

Vielen Dank für die fünf Sterne und die ausführliche Beschreibung! Besonders freut mich, dass du Live Activities und Bluetooth Heartbeat genau so nutzt, wie ich es mir bei der Entwicklung vorgestellt habe. Deine Hinweise zur Einrichtung helfen sicher auch anderen, die Funktionen zu entdecken. Schön, dass FLwatch für dich im Alltag so gut funktioniert!

A request please.

Is it possible to get the clock hands to reflect the colour, so red for low, green in range and orange too high. It would make my brain very happy if you could do this please. Been using this app for a good while now, still loving it and it’s my go-to for checks. Thankyou.

Response from developer

Thank you for the five stars and your continued support! I can see how matching the clock hands to your glucose range would make checking at a glance easier. If you mean the hands on your Apple Watch face, unfortunately Apple doesn’t let apps change their colour based on glucose readings, so I can’t implement that in FLwatch. If you mean a different part of the display, please send me a screenshot via support email so I can take a closer look. Thank you again—it’s lovely to hear that FLwatch is still your go-to!

Great App! Highly recommended!

Great to see readings on widgets, also with a reload and time from last reading feature. I’ve been using with iPhone, iPad and Mac. I’m now thinking about getting an Apple Watch to have a faster way to see my readings.

I see you added an option to sync to apple health, but the switch to export on the app won’t slide. In settings Apple Health FlWatch is switched on to allow as a source, but still on the app I press y slide on to export the data is not possible. Is it just me?
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Response from developer

Thank you for coming back with another review — and I’m glad to hear you’re still enjoying FLwatch! Apple Health support was added after requests like yours, so it’s especially nice to see you using it now. Regarding the export switch: until now, FLwatch required permission for both glucose and insulin data before Apple Health export could be enabled. I recently changed this so the two are handled independently — for example, allowing glucose alone is now sufficient if that’s all you want to export. That improvement will be included in the next release, so what you’re seeing should be resolved there. Thanks again for the feedback and for sticking with FLwatch!

This is an exceptional app.

Fit for purpose, no fluff, no annoyance. Just one thing please, can the long action be part of the input as well as fast acting then on the graphs it can be estimated for different time delay tweaking please.
And a button to hide the ‘since the last reading’ as I keep mistaking it for my clock.
Cheers. I love it and Thankyou muchly.
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Response from developer

Thank you very much for the lovely review — I really appreciate it! Regarding long-acting insulin: FLwatch’s current IOB calculation is intended for rapid-acting insulin, as basal/long-acting insulin is normally treated separately rather than being included in IOB. That said, I’ll have a look at whether long-acting insulin could be entered and represented on the graphs in a useful way without making the IOB display misleading. And regarding the “since the last reading” display: I think you mean the indication showing how many minutes have passed since the last glucose value. If so, I can certainly look into providing an option to hide it. Thanks again for the kind words and for the suggestions — feedback like this is very helpful!

Great looking app but it eats battery charge!

I installed this app two days ago and have to say that initially I was very impressed. Really nice graphics and faultless operation. After 24 hours it became apparent that both phone and watch battery charge levels were being badly impacted. Another 24 years on and the iPhone battery app reports over 50% usage by the FLwatch app.
I have reverted to SweetDreams app which functions the same but only uses a few percent in the same time. Real shame. 😞

Update. After a rebuttal from the writer, I reinstalled the App just to find that it screws battery life just as bad as before. Over 60% of my battery consumption was the FL Watch app on the first day. Needless to say I’ve removed it again.
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Response from developer

Thanks for the feedback. I have since done some additional profiling of FLwatch’s battery usage and identified the Live Activity as one area where consumption could be significantly reduced. In particular, rendering the glucose graph every minute was more expensive than necessary. This has now been reworked with a much more lightweight rendering approach and will be included in the next FLwatch release. In the meantime, users who experience higher-than-expected battery consumption can disable the Live Activity in FLwatch, which should considerably reduce its battery impact while keeping the rest of the app available. One small clarification regarding the percentage shown in iOS Battery settings: this number represents FLwatch’s share of the battery usage attributed to apps during the selected period. It does not mean that FLwatch itself consumed that percentage of the phone’s total battery charge. For example, an app can account for a large percentage of reported app usage even when the overall battery drain during that period was relatively small. Battery efficiency is something I continuously look at as part of developing FLwatch, and improvements like this are made whenever I find an opportunity to reduce resource usage without sacrificing functionality.

A Very Underrated App, IMO

There are other Glucose apps, which charge for live activities not nearly as accurate and helpful as FLwatch. I started using this when I still had an Apple watch which I’ve since ditched because of the inexcusable battery life. Still use on my iPhone and the Live Activities update with my Librelink app immediately. Thank you for a great app with both privacy and great performance.
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Response from developer

Thank you so much for your kind words and for taking the time to leave such a thoughtful review! I’m really happy to hear that FLwatch continues to be useful for you, even after switching away from the Apple Watch. It’s especially great to know that the Live Activities and LibreLink updates are working well for you. FLwatch is a free, open-source project that I develop in my spare time, so feedback like yours means a lot. Reviews like this are not only a huge motivation to keep improving the app, but they also help increase its visibility in the App Store, making it easier for other people with diabetes to discover it. Thank you again for your support and for being part of the FLwatch community. Wishing you all the best and stable glucose readings!

Works great

This app does what Libre 3 is too lazy to do, it talks to my Apple Watch! Yay! Now I have to figure out why it won’t talk to Apple Health.

Top

This is exactly what the Abbot app is missing. Thank you very much for working on this!

Response from developer

Thank you very much! I’m really glad FLwatch adds something useful that you were missing. Feedback like this is a great motivation to keep improving the app!

Usefull

This app is great. It brings functionality that Freestyle should really supply via their app. Well done and thanks

Response from developer

Thanks. Glad it helps! 😊

At last, an app that’s practical!

love love love the app. User friendly and just sensible. Being able to easily see what’s going on at a glance without having to open apps and pressing a million buttons is amazing. My only suggestion/request would be to make the ‘resulting carbs’ button a free-fill option when we know the carb quantity already. Coffee donation on it’s way to you, it’s well deserved for making my (and my kids) life so much easier. Thank you!
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Response from developer

Thank you so much for your review. I agree with the carb field. But I could not make it accepting input as well. And adding another field made everything too cluttered. My wprkaround: add the carbs on the carb/100g field, tap the 100g portion field and there you have the carbs you entered. 😊

Great looking app but it eats battery charge!

I installed this app two days ago and have to say that initially I was very impressed. Really nice graphics and faultless operation. After 24 hours it became apparent that both phone and watch battery charge levels were being badly impacted. Another 24 years on and the iPhone battery app reports 40% usage by the FLwatch app.
I have reverted to SweetDreams app which functions the same but only uses a few percent in the same time. Real shame. 😞
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Response from developer

Thanks for taking the time to leave feedback and for trying FLwatch. FLwatch is a free and open-source project that I develop in my spare time to help the diabetes community. I genuinely appreciate bug reports, feature suggestions, and constructive criticism, because they help improve the app for everyone. That said, some limitations are outside of the app’s control — especially regarding iOS/watchOS background updates, widget refresh frequency, and battery usage, which are heavily restricted by Apple’s system policies and can vary significantly between devices and configurations. I always try to improve performance, reliability, and battery efficiency whenever possible. If something is not working as expected, please consider reaching out through the project channels with details about your setup so issues can be investigated properly. Thank you again for your support, patience, and understanding.

Excellent. Top notch

Very useful to get the libre 2 sensor data in near real time on the apple watch. The widget was easy to set up a complication on ultra watch face instead of (music) and i get a direct read of sensor data.. clicking on brings up a graph. All I need! Great!

Diabetiker Must have

Ich kann dem Entwickler nur meinen herzlichen Dank aussprechen und hoffe meine Kaffeebohnen haben geschmeckt.
Alleine für die Carplay Funktion gibts bei mir schon 100 Punkte. Unverständlich das Abbott so etwas nicht auf die Reihe bekommt, bei den Milliarden die die mit Libre verdienen.

Works but fails to update

The app works as advertised, only problem is that the lock screen graph and number do not update. When you press the update button, it opens the app. This is not why I wanted this. I want an app the can be made to show the current blood glucose number as measured by my CHM to show on the lock screen. Three stars as the app is halfway there….
Wow, got a nasty message from the developer. Diabetics are looking solutions. I understand that being limited by iOS is frustrating but not nearly as frustrating as monitoring your vital signs every 15 minutes and taking six shots of insulin a day. Maybe the rating should one star based on customer service.
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Response from developer

Thanks for taking the time to leave feedback and for trying FLwatch. FLwatch is a free and open-source project that I develop in my spare time to help the diabetes community. I genuinely appreciate bug reports, feature suggestions, and constructive criticism, because they help improve the app for everyone. That said, some limitations are outside of the app’s control — especially regarding iOS/watchOS background updates, widget refresh frequency, and battery usage, which are heavily restricted by Apple’s system policies and can vary significantly between devices and configurations. I always try to improve performance, reliability, and battery efficiency whenever possible. If something is not working as expected, please consider reaching out through the project channels with details about your setup so issues can be investigated properly. Thank you again for your support, patience, and understanding.

Genial

Endlich eine App die den Blutzuckerwert auf der Uhr anzeigen lässt und das sogar mit Verlauf. Alle 15 Minuten wird der Wert aktualisiert und das ist genial so hat man den Zucker kontinuierlich unter Kontrolle - nach dem Essen sollte man ja sowieso wieder erst nach 2 Stunden messen bevor man mit dem Insulin gegenreguliert.
Ich hoffe der Erfinder der App gewinnt im Lotto weil die App ist Goldwert!
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Muito bom

Muito bom porém sinto falta de mais gráficos de acompanhamento e não há opção para registrar injeção de basal

Response from developer

Obrigado. Que tipo de gráfico você gostaria de ver? A insulina basal não é incluída nos cálculos da insulina ativa. Ela deve permanecer constante e é normalmente administrada apenas uma vez por dia ou a cada dois dias.