I did WW a few years ago, with carb counting too, not eliminating carbs totally, nor counting points (just carbs-insulin) along with exercise & I lost about 2Kg (5lbs) in the 3 months I did it for. Though as you say, I couldn't stick to it either & have put it back on, though still exercising at the gym & cycling too.
I've not used any app's or anything for weight loss, just will power, knowledge & support should help. searching for low carb meals or foods would help too with having less insulin (bolus & basal) if you need to.