Just thought I'd chime in with my experience. I was overweight and wanted to do something about it. I started IF, eating during an 8 hour window during the day (usually 11AM-7PM), ate healthier foods (eat food, not too much, mostly plants --no other specific restrictions), and exercised daily (ran 30 minutes every day). I lost about 40 lbs in 8 months (around 5 lbs a month average).
Oh, and since I have a huge sweet-tooth, I ate a CRAP-TON of fruit during this process. Like 2 apples and 3 oranges a day, sometimes...
Now I'm lean, feel great, and still run every day. I have maintained my current weight for about 6 months now. I don't IF anymore, but I never eat after 8PM.