Check whether the time of a meal and of a symptom can be set side by side, whether a note can be added and the entries exported. Automatic matches should not be presented as an established cause.
For someone with IBS or Crohn's disease, Bowelle genuinely helps identify triggers and produces data in a format that is easy to share with a gastroenterologist. The feature set is niche but well executed, and users stick around for years.
評価点：A timeline of symptoms and food in one log that is convenient to show a gastroenterologist.
不満点：Analytics do not find correlations automatically — you have to hunt for patterns in the data yourself.
向いている人：People with IBS, Crohn's disease, and other chronic digestive disorders
For a diabetic using a Libre or Dexcom, SNAQ genuinely helps lower A1c by connecting glucose and food data on one screen. After each major update something breaks, and users have to relearn the app.
評価点：A detailed three-hour report on glucose response to a specific meal.
不満点：The food database is small, and user-created recipes with custom ingredients do not calculate net carbs.
向いている人：Diabetics with a Libre or Dexcom continuous glucose monitor
The only dedicated food intolerance diary in the selection rather than a calorie tracker: it helps find correlations between food and symptoms. The analysis algorithm is weak and can flag 'water' as the main trigger, and the registration flow with a nickname selection often freezes.
評価点：Helps identify real food triggers in chronic illness through a symptom diary.
不満点：The correlation algorithm gives false positives and does not always deliver useful insights after weeks of logging.
向いている人：People with IBS, food allergies, or intolerances who need a symptom log
The most thorough free micronutrient tracker in the category: the only one that shows vitamins, minerals, and a full nutritional profile at no cost. A recent update degraded search results by pushing branded items ahead of generics, which seriously slows down daily logging.
評価点：Six years of loyal users stay for the micronutrient tracking alone. No other free app comes close.
不満点：After the latest update, search ranks branded products above basics, so finding 'banana' now takes several screens of scrolling.
向いている人：People who track vitamins and minerals, not just calories
