Comparison

Flexible Dieting Method vs CalSlashD

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Flexible Dieting Method

Features
Read full description

The Flexible Dieting Method app is designed for clients of trainers who have enrolled in the Flexible Dieting Method program. The app will send push notifications and prompt clients to answer yes/no question in regards to comply with healthy habits sent by your coach. WHO CAN USE THE APP Clients can only use the app if they are working with a Flexible Dieting Method coach. If you are a Flexible Dieting Method client, please contact your coach to receive your invite and login credentials to be able to use this app. The Flexible Dieting Method app allows access to HealthKit, allowing clients to automatically pull in their activity and steps data from Apple Health to their app.

About

CalSlashD

Features
Read full description

Most calorie trackers hold you to a strict daily limit. Cal/d tracks your daily average instead, so one heavy day doesn't wreck your progress. Set a start date and daily limit, and Cal/d reads dietary energy from Apple Health to show: - Daily Average: total calories since your start date, divided by days elapsed. - Remaining Calories: stay under your limit and you build a surplus to spend whenever you want. - Surplus Goal: surplus divided by daily limit is how many days you've saved. Set a target (say, 3 days). - Countdown to Next 250: a timer until your next 250 calories, expandable to 5 timers ahead (20 with Plus). Don't want to wait? Factor in Active Energy too. A jog raises your surplus and moves you closer to your goal. Log calories and nutrition directly in Cal/d, or keep your current tracker and open it with one tap from a built-in link list. Anything that writes to Apple Health, Cal/d can read. On Apple Watch, turn the Digital Crown through your budget, pace, average, goal, and countdowns, and add complications to your watch face. PLUS FEATURES: - Unlimited What-If calorie planning - Unlimited surplus-goal days - All 20 countdown milestones - Custom Stats date ranges longer than 30 days - "Last…" Stats periods beyond the last 7 days - After-exercise pace comparison - Live Activity on the Lock Screen and Dynamic Island - Calorie checkpoint notifications Cal/d is not medical advice. Consult your doctor before changing your diet.

Screenshots

Flexible Dieting Method4 screens
CalSlashD4 screens

Verdict

The call

The clearest difference is in-app purchases: Flexible Dieting Method at none against CalSlashD's 1. Flexible Dieting Method also leads on iOS requirement (15.0 vs 18.0). CalSlashD's advantage is update cadence (every 2 days vs every 3 weeks). On price, ads and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. CalSlashD sells 1 one-off in-app purchase. Flexible Dieting Method asks for nothing beyond the download.

UpkeepUpdate frequency

Flexible Dieting Method ships an update every 3 weeks, CalSlashD every 2 days. The most recent releases landed on October 24, 2026 and October 28, 2026 respectively.

Scorecard3 real differences · 3 level
Flexible Dieting Method versus CalSlashD: the parameters behind the verdict, then further details
ParameterFlexible Dieting MethodCalSlashD
PriceFreeFree
Update frequencyEvery 3 weeksEvery 2 days — better
AdsNoNo
In-app purchasesNo — betterYes
DevicesiPhone, iPad, iPodiPhone, iPad, Apple Watch
Requires iOS15.0 — better18.0
Further details — not scored
Size49 MB10 MB
Age rating4+4+
DeveloperDelicious Deficit LLCDaniel Hotyanov

In-app purchases

None

Flexible Dieting Method

No in-app purchases

1 purchases

CalSlashD

One-time1
  • Cal/d Plus$9.99

Questions

Is Flexible Dieting Method free?
Flexible Dieting Method is free to download, with no in-app purchases.
Is CalSlashD free?
CalSlashD is free to download, with in-app purchases available.
Do Flexible Dieting Method or CalSlashD have ads?
Neither Flexible Dieting Method nor CalSlashD shows ads.
Which is updated more often, Flexible Dieting Method or CalSlashD?
Flexible Dieting Method ships an update every 3 weeks, and CalSlashD every 2 days. Most recently, Flexible Dieting Method was updated on October 24, 2026 and CalSlashD on October 28, 2026.

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