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Main concern is to control data sharing.

1 Set macro or caloric goal

2 Search for foods

3 Add breakfast, lunch, snack and dinner

4 Clear macro breakdown of every meal

5 Displays daily total and daily target (15g of fat out of 30g target)

6 No login and keeps all data on the device only

7 Easy interface that can be used by elderly people (large numbers)

8 Micro-nutrients counter huge plus but not necessary

If 6 doesn’t exist whatever is the best alternative.