Ask HN: Apps or software to help with weight loss? What worked for you?

I'm way over what I'd like to weigh, and I'm going to go on a diet (again). The last time I successfully did so (several years ago), I loosely followed something called the Hacker's Diet (https://www.fourmilab.ch/hackdiet/), and (most importantly) subscribed to a controlled-calories food delivery service. For software, I filled an Excel spreadsheet (I now see they have an online software version ).

I'm not going to subscribe to the controlled diet service (too expensive), so I'm going to need to calculate calories in what I eat, and measure my weight.

So, what are any web or Android apps you've tried or recommend to help with this? Weight trackers? Food / menu managers? Calorie counters?