Figure out how many calories you need to maintain your weight and eat less then that.
A calorie calculator can estimate how many calories you burn a day and can estimate plans based on how much weight you want to lose per week.
Exercise so that you don't lose muscle mass and your body burns the stored calories.
And finally, test things and find what works for you. Staying consistent is key.
For myself, I like a Zig Zag plan for losing weight cause I can still enjoy some junk food on the weekend. I track my calories using MyNetDiary because it syncs with other apps I use.
I've lost 15lbs in 4 weeks but I know it's going to take about 5 more months to meet my goal weight.
Good luck on your journey!
Hell's Kitchen and Lethal company.
Gordon Ramsay setting some unrealistic standards.
Since Lemmy is not a single entity but a group of people hosting the servers, there is not official app.
Your question is similar to "There is no official email app?".
There are hosts like Outlook and Gmail. Similarly, Lemmy.ml and Lemmy.world would be the equivalent. While outlook and Gmail have their own apps, individual instances rely on third party apps like Jerboa, Liftoff, etc. for mobile users.