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Best Diet Tracking Apps for iPhone (2026)

21 apps ranked S through F · · Ranked by AppTierList, computed, never sold · JSON

WeightWatchers Program is the top-ranked of 21 diet tracking apps on iPhone, at S tier with 4.8/5 from 2,364,830 ratings.

  1. 1
    WeightWatchers ProgramS
    Free + IAP · ★ 4.8 · 2,364,830 ratings · score 94
  2. 2
    Keto Diet App - Carb TrackerS
    Free + IAP · ★ 4.7 · 82,192 ratings · score 93
  3. 3
    Healthi: Weight Loss, Diet AppA
    Free + IAP · ★ 4.8 · 89,967 ratings · score 90
  4. 4
    Unimeal: Fasting and DietA
    Free + IAP · ★ 4.4 · 12,874 ratings · score 89
  5. 5
    CalDiet - Food Analysis PalA
    Free + IAP · ★ 4.8 · 42,192 ratings · score 88

What belongs in this list

I want to follow a specific diet plan and log what I eat so I can see whether I am sticking to it.

Not here: Calorie counting alone; Nutrient and vitamin breakdown alone; Keto carb counting alone; A recipe collection alone; Workout logging alone

How we pick

For this list we ask the App Store the same searches a person would, in several countries, and keep every app it returns. A model reads each app's listing and rejects the ones that only mention the use case. Every app that stays is scored out of 100 from four parts, each 0 to 100 and averaged with no weights: its App Store rating, how many people rated it, where the App Store itself ranks it for this list's searches, and how recently its current version shipped. An app showing Apple's Editors' Choice badge gets a fifth part of 100, which can only lift its score. Tiers follow fixed score bands: S from 90, A from 80, B from 70, C from 60, D from 50, F below. The list's leader is S if it scores 80 or more. On a list of 20 or more ranked apps, a tier from S to D takes in new apps only up to a quarter of the top 40: an app pushed out of a full tier falls to the next tier with room, and F takes the rest. An app already in a tier keeps its place while the tier is at most 2 apps over a quarter; past that, only the apps over that margin go down, lowest score first. Equal scores share a tier, and no app has a better tier than an app ranked above it. An app keeps its tier until its score passes the band edge by more than 1 point, or a full tier or the order above moves it. Only the top 40 of a list get a tier. Read the full method →

S
WeightWatche…Keto Diet App
A
HealthiUnimealCalDietFormulaKeto diet
B
wikifit
C
Mayo ClinicCalorie Counter by SIT30Dr. Greger’sno.Diet
D
SenzaNinja FitKetoDiet
F
Value DiaryTotal Keto21 Day Fix®Whole EatsLose WeightCalorie counter & Diet tracker

Compare every app

  1. 1
    WeightWatchers ProgramS
    Free + IAP · ★ 4.8 · 2,364,830 ratings · score 94 · best in class
  2. 2
    Keto Diet App - Carb TrackerS
    Free + IAP · ★ 4.7 · 82,192 ratings · score 93 · best in class
  3. 3
    Healthi: Weight Loss, Diet AppA
    Free + IAP · ★ 4.8 · 89,967 ratings · score 90 · excellent
  4. 4
    Unimeal: Fasting and DietA
    Free + IAP · ★ 4.4 · 12,874 ratings · score 89 · excellent
  5. 5
    CalDiet - Food Analysis PalA
    Free + IAP · ★ 4.8 · 42,192 ratings · score 88 · excellent
  6. 6
    Formula - weight loss diet appA
    Free + IAP · ★ 4.5 · 35,509 ratings · score 87 · excellent
  7. 7
    Keto diet app-Low carb managerA
    Free + IAP · ★ 4.6 · 62,047 ratings · score 87 · excellent
  8. 8
    wikifit - Diet Calorie TrackerB
    Free + IAP · ★ 4.6 · 15 ratings · score 79 · good
  9. 9
    Mayo Clinic DietC
    Free + IAP · ★ 4.7 · 3,741 ratings · score 67 · situational · provisional
  10. 10
    Calorie Counter by SIT30C
    Free + IAP · ★ 4.8 · 60 ratings · score 64 · situational · provisional
  11. 11
    Dr. Greger’s Daily DozenC
    Free download · ★ 4.9 · 12,683 ratings · score 63 · situational · provisional
  12. 12
    no.DietC
    Free download · ★ 4.3 · 2,865 ratings · score 63 · situational · provisional
  13. 13
    Senza: Keto & FastingD
    Free download · ★ 4.8 · 10,814 ratings · score 59 · weak · provisional
  14. 14
    Ninja Fit: Ai Calorie trackerD
    Free + IAP · ★ 4.2 · 10 ratings · score 56 · weak · provisional
  15. 15
    KetoDiet: Fasting & Meal PlansD
    Free download · ★ 4.4 · 2,449 ratings · score 54 · weak · provisional
  16. 16
    Value Diary - Weight Loss DietF
    Free download · ★ 4.7 · 3,625 ratings · score 43 · avoid · provisional
  17. 17
    Total Keto Diet: Low Carb AppF
    Free download · ★ 4.6 · 3,989 ratings · score 42 · avoid · provisional
  18. 18
    21 Day Fix® Tracker - OfficialF
    Free download · ★ 4.6 · 2,485 ratings · score 41 · avoid · provisional
  19. 19
    Whole EatsF
    $2.99 · ★ 4.4 · 7,797 ratings · score 41 · avoid · provisional
  20. 20
    Lose Weight - Calorie CounterF
    Free + IAP · ★ 4.1 · 8 ratings · score 32 · avoid · provisional
  21. 21
    Calorie counter & Diet trackerF
    Free + IAP · ★ n/a · 0 ratings · score 0 · avoid · provisional

New in the last 30 days

Questions people ask

What is the best diet tracking app for iPhone?
WeightWatchers Program, S tier, ranked #1 of 21, rated 4.8 by 2,364,830 people.
Which diet tracking apps are free?
20 of 21 are free to download: WeightWatchers Program (S), Keto Diet App - Carb Tracker (S), Healthi: Weight Loss, Diet App (A), Unimeal: Fasting and Diet (A) and more. 13 of them sell in-app purchases.
Which diet tracking app has the best App Store rating?
Dr. Greger’s Daily Dozen at 4.9 from 12,683 ratings.
How many diet tracking apps reach S or A tier?
7 of 21. Tiers follow fixed score bands: S from 90, A from 80, B from 70, C from 60, D from 50, F below. The list's leader is S if it scores 80 or more. On a list of 20 or more ranked apps, a tier from S to D takes in new apps only up to a quarter of the top 40: an app pushed out of a full tier falls to the next tier with room, and F takes the rest. An app already in a tier keeps its place while the tier is at most 2 apps over a quarter; past that, only the apps over that margin go down, lowest score first. Equal scores share a tier, and no app has a better tier than an app ranked above it. An app keeps its tier until its score passes the band edge by more than 1 point, or a full tier or the order above moves it. Only the top 40 of a list get a tier.

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