I already use the Libra app which has been discussed many times on this forum, and which is available for android devices (I don't know if there is an iOS or Windows Phone version of that as well). That shows a trend line and from that, it also calculates what my current weight would be according to that trend (known as the trend weight, which is what I have been reporting on my blog on this forum). That way, it is easy to see whether or not I am on track.
There has actually been a few good examples recently of why daily weighing has been a real God-send for me, the best example of that was when I first met my target of getting below 11 and a half stone. Just prior to that, I was overeating over the weekend and was gaining weight with that. Until that binge, it had looked as though I was going to easily meet that target but then that binge put me outside of that target weight. That meant that I had to lose weight on the Sunday in order to achieve that target but if I wasn't weighing myself every day, I would not have spotted that this weight gain was happening. That means that I would probably have continued my binge through the Sunday as week, and then failed to meet my target because of that.
However, because I had spotted that weight gain which was happening, I was then able to act on that by having a reduced calorie (but not a fasting) day on the Sunday and with that, I was then able to lose the weight that I needed to lose by the following day to meet my target and thus, enter into weight maintenance.
Incidents like that, are the very reason why I will continue to defend the concept of daily weigh-ins and whilst there are people on this forum who say that I shouldn't be weighing myself daily, I know that there are also others on this very forum who will also advocate daily weigh-ins. At the end of the day, I will listen to what everyone has to to say on this forum. However, any actions which I take as a result of that will be done because I feel that they are the best actions to take, and not because someone on this forum has said that I should take those actions.
The same thing is true when it comes to advice on what I should or should not be eating because at the end of the day, I will not be told what to eat by anyone, and that includes anybody on this forum. Furthermore, we are approaching Christmas, and I'm trying to wind towards that which means that healthy eating isn't exactly going to be a top priority over the next couple of weeks or so anyway.