This app was mentioned in 16 comments, with an average of 2.25 upvotes
You have made a solid effort so far in making an app, which is farther than I've gotten in my efforts. But I really think you would focus your efforts towards design as the app looks really outdated. Truth is aesthetically pleasing apps get more downloads even if they have less features.
With that being said, if I had diabetes, I would use this app. It does pretty much everything your app does and it has material design.
The Libre link app allows you to log the carbs you eat, and insulin taken, etc, it just doesn't do the automatic calculations. The physical meter also won't do automatic calculations for the flash readings, only blood ones. Never quite understood why but I'm going to assume lawyers and the marginal reduction in accuracy in flash readings are to blame.
Personally I just do the maths in my head.
If you'd prefer something that does the maths automatically I previously tried using the Diabetes:M Logbook/Management app which supports reading the Libre and has a calculator built in. I didn't like it enough to pay the £5 a month to get rid of ads, but it might be worth a look.
Wouldn't be surprised if some of the other logbook apps with calculators also can read the Libre, but I haven't tried any and a quick play store search only showed Glimp that doesn't seem to have a calculator (though can be linked with other services, so might be possible to rig one up)
I've tried a couple, but the one I've liked the most and am currently using is Diabetes:M. It also has good reviews from other users. (https://play.google.com/store/apps/details?id=com.mydiabetes)
It's great for posting food, insulin, pump settings, etc. It also allows you to look up food in a database from the app and create meals. The data analysis and ability to export all freaking kinds of graphs is amazing. I also like that it tells me how my sugars have been trending lately so I know what I need to focus on short term as opposed to "lowering my A1c". It also has hints for how to use pretty much every one of its features. I think it also has the option to link a couple of devices (none of which I have) but would be even greater if you did.
I use the Bolus Calculator from Diabetes:M.
I set up my carb ratio and insulin sensitivity in the app Settings and it`s really awesome.
I have the widget from the app on my main screen. Once I tap it it takes me straight to the Bolus calculator.
There I input my glycemia, for carb counting it has food databases(I use the USDA one). You can add to the list the food you don`t find in the data base.
After all this the Calculator shows me the amount of ui of insulin needed(it takes into account corrections to reach the ideal glucose value set by you and to cover the carbs for your meal).
PS: You don`t need the premium version. The free version does the job.
https://play.google.com/store/apps/details?id=com.mydiabetes&hl=en&gl=US
Felnőttként diagnosztizáltak 1-es típusú cukorbetegséggel, ez az autoimmun, szurkálós változat. Három év után mostanra lassan megszoktam. Az életmódváltáshoz a kórházi dietetikus abból indult ki, hogy mit szoktam általában enni, és ezt hogyan lehet egészségesebbé tenni (pl. ha szendvicsezek, akkor teljes kiőrlésű kenyér, cukros müzli helyett zabkása, kellő zsír+fehérje hozzáadása a szénhidrátos cuccokhoz hogy lassabban szívódjon fel). Ha lépésről lépésre változtat az ember, könnyebb nem begurulni az egészre.
Ha szükséges az étkezésekhez inzulinozni, bosszantó a számolgatás, hogy x grammnyi szénhidráthoz mennyi kell, de vannak nagyon jó appok (pl. Androidra Diabetes:M, Androidra/Apple-re MyFitnessPal.
Ahogy a többiek is írták, az elején tök sokat segít, ha van egy viszonylag fix napirend és szénhidrátkeret, amihez tudod tartani magad, és abszolút segít látni az actual vércukorértékeket is, szóval szükséges rossz az ujjszurkálás. (Mutatóujjat és az ujjbegyek közepét sose, úgy kevésbé fájdalmas, meg nem tompítja le az érzékelést.) Ha esetleg 1-es típusúval diagnosztizálnak (szurkolok, hogy ne az legyen), akkor javaslom, kérdezz utána a szenzoros vércukormérőnek. Tavaly óta TB-támogatott, kb. egy nikotintapasznyi méretben 5 percenként küld cukorértéket, és kevesebbet kell ujjból mérni.
Az /r/diabetes sub jó hely még, többet tanultam innen, mint a diabetológusomtól, és jók a mémek is.
Diabetes:M: https://play.google.com/store/apps/details?id=com.mydiabetes
The best app for diabetes control. Support libre readings directly as bluetooth glucosimeter too. Suporta CHO counting, have lots of nutritional table inside, can calculate bolus insulin and correction dosis, supports custom correction rates, support doctor sync account too.
Using it around 3 years and loving it more each day.
Disclaimer: I'm Type 1 diabetic.
xDrip+ has CorrF and CarbF settings, but the problem with these are you should set different factors to different times on a day. For example I have CorrF around 1.6 mmol/l in the morning and 2.4 mmol/l in the evening.
Most of the pumps have hourly factors you can set up. My Animas Vibe works pretty well in this regard, but requires some tweaking to get right.
For Android, even though I love, use and develop xDrip+, the best CorrF and CarbF calculator is in Diabetes:M app. You can set different factors throughout the day and giving the target, carbs and current BG it tells you the amount of insulin you need to take.
You just need to do some tests to get the factors right. In John Walsh's book Pumping Insulin I've found the best instructions how to do the tests at home, what are the starting values for your weight and A1c and how to tweak the factors depending on the result. I seriously recommend reading the book, even if you are not using an insulin pump.
Try an app called Diabetes:M. Less bullshit and better insulin calculator.
https://play.google.com/store/apps/details?id=com.mydiabetes
https://play.google.com/store/apps/details?id=com.mydiabetes
Doesn't tie into fit (or at least it didn't last time I looked, but the watchfaces are good)
Diabetes M does it all. Carb counting, insulin calculation based on carbs, estimated A1C etc...
I use this one
https://play.google.com/store/apps/details?id=com.mydiabetes
Try this app
Hope it's compatible with your device + country
I've been using Diabetes: m. It has a few different food databases and you can add w/e is missing.