Answers
How accurate is the better. app?
A free calorie counter gives estimates, not measurements. Here is how we check them.
Published by Barbaros Selim Büyükelçi, developer of better. We are not a neutral third party.Updated

No estimate from a photo is exact, and we do not claim 100% accuracy or publish an accuracy number here. We check estimates against meals with a known reference value, and we keep typed meals, photos, corrected photos and photos with answered questions apart.
How we measure
We compare estimates with meals whose values are known: recipe photos, product labels, reference foods and dishes derived from a recipe. Results are reported by type of input, so the easy case and the hard case are not averaged together.
- Typed meals with amounts
- Photos, as taken
- Photos where the card was corrected
- Photos where the questions were answered

What to expect
Typed meals with amounts are the easiest case for any estimator. Photos of mixed dishes with hidden oils and unclear portions are the hardest. better. asks about the portion when it would change the calories, marks what it assumed, and lets you correct any amount.
An estimate is an estimate. Estimates and insights are not medical advice.