Calorie counting is the only truly reliable way to lose weight
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In general, when I was losing weight I did not really need to count calories, I just ate less than I did. And this worked because I was always hungry especially initially, until the body adapts. If you're always going to check "can I eat this one more thing dear calculator" I'd say you're not really ready to lose weight because tormenting yourself like this every day you will burn out before you can make a dent.
This is the wrong way to look at it. Sometimes you'll have a larger banana, sometimes a smaller banana, but overall it'll average out. What you need is consistency to compare to your own previous measurements, not perfect accuracy.
For example: By counting my calories and keeping track of my weight, I've learned that I burn about 2200 calories per day. If I went over my foods and measured them perfectly it probably wouldn't be that number, but because I'm consistent in how I measure it I can know with certainty whether I'm above or below that limit. I've been able to reliably control my weight for a few years now because of this and I'm not even measuring, just eyeballing how much of things I use.