Comparison

ardi vs FatBurn Watch

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

Head to head
About

ardi

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ardiアプリでは、スマートソールで測定された足や歩行のデータを可視化します。 計測データをもとに、姿勢や歩き方のクセをわかりやすくフィードバックします。 自分では気づきにくい日常の姿勢や歩き方の変化を捉え、今の状態や課題に応じたアドバイスやエクササイズを提案します。 スマートソールをいつもの靴に入れるだけで、日々の動きから自分の体の状態を知り、改善につなげることができます。

About

FatBurn Watch

Features
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FatBurn Watch helps you stay in your fat-burn heart-rate zone during cardio workouts at the gym. Set your profile and target zone on iPhone, then start a workout on Apple Watch. When your heart rate stays above the upper limit, the Watch alerts you with haptics, sound, and an on-screen warning so you can ease back without staring at the screen. Pro — one-time purchase Explore daily, weekly, and monthly charts of time and percentage in your target heart-rate zone. Set weekly goals, track consecutive goal weeks, and show synced progress on widgets and your Apple Watch face. No monthly or yearly fees. Heart-rate alerts, workout tracking, and saving to Apple Health remain free. Workout history is a Pro feature for new users, with a sample preview before purchase. People who first downloaded the app before this change receive all Pro features, including the new analysis, at no extra charge. Key features - Start and stop workouts on Apple Watch - See real-time heart rate during a session - Estimate HRmax from age (Fox or Tanaka formula) - Personalize your zone with resting heart rate (Karvonen method) and measured HRmax from Health - Tune target zone (% of HRmax or Direct bpm) and alert sensitivity - Mute alerts for short breaks - Save workouts to HealthKit Privacy Heart-rate and workout data stay on device and in HealthKit. FatBurn Watch does not send this data to external servers, track you, show ads, or use third-party analytics. Important FatBurn Watch is not a medical device. It is a heart-rate feedback tool for workouts and is not intended to diagnose, treat, or prevent any medical condition. Consult a physician if you have health concerns.

Screenshots

ardi4 screens
FatBurn Watch4 screens

Verdict

The call

The clearest difference is in-app purchases: ardi at none against FatBurn Watch's 1. ardi also leads on iOS requirement (15.0 vs 17.0). On price, update cadence, 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. FatBurn Watch sells 1 one-off in-app purchase. ardi asks for nothing beyond the download.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly weekly. Both last shipped on November 5, 2026.

Scorecard2 real differences · 4 level
ardi versus FatBurn Watch: the parameters behind the verdict, then further details
ParameterardiFatBurn Watch
PriceFreeFree
Update frequencyWeeklyWeekly
AdsNoNo
In-app purchasesNo — betterYes
DevicesiPhone, iPodiPhone, Apple Watch
Requires iOS15.0 — better17.0
Further details — not scored
Size102 MB12 MB
Age rating12+4+
DeveloperFlicfitLFT Inc.

In-app purchases

None

ardi

No in-app purchases

1 purchases

FatBurn Watch

One-time1
  • Pro Unlock$3.99

Questions

Is ardi free?
ardi is free to download, with no in-app purchases.
Is FatBurn Watch free?
FatBurn Watch is free to download, with in-app purchases available.
Do ardi or FatBurn Watch have ads?
Neither ardi nor FatBurn Watch shows ads.
Which is updated more often, ardi or FatBurn Watch?
ardi ships an update weekly, and FatBurn Watch weekly. Most recently, ardi was updated on November 5, 2026 and FatBurn Watch on November 5, 2026.

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