Comparison

ardi vs RunnersHeart

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

RunnersHeart

Features
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RunnersHeart transforms your Apple Watch into a smart running coach that keeps you in the right heart rate zone. REAL-TIME ZONE FEEDBACK • Feel haptic vibrations when you enter a new heart rate zone • Each zone has a unique vibration pattern - instantly know your intensity • Stay in your target zone without constantly checking your watch PERSONALIZED HEART RATE ZONES • Choose between %MaxHR (simple) or Heart Rate Reserve (advanced) methods • Auto-estimate your resting heart rate from HealthKit data • Zones automatically calculated based on your age and fitness level DETAILED WORKOUT ANALYSIS • View time spent in each zone with beautiful charts • Track your training load with Edwards TRIMP score • See your GPS route with smoothed path visualization • Share workout cards as beautiful images DESIGNED FOR RUNNERS • Minimal interface - focus on your run, not your screen • Works offline - no internet required during workouts • All data stays on your device - complete privacy • Syncs seamlessly between iPhone and Apple Watch HEART RATE ZONES EXPLAINED Zone 1 (Warmup): Easy effort, recovery Zone 2 (Endurance): Comfortable, fat-burning pace Zone 3 (Tempo): Moderate effort, improves efficiency Zone 4 (Threshold): Hard effort, builds speed Zone 5 (Sprint): Maximum effort, peak performance Whether you're training for a marathon or just getting started, RunnersHeart helps you run at the right intensity for your goals. Privacy: Your health data never leaves your device. We don't have servers - everything stays between you and Apple HealthKit.

Screenshots

ardi4 screens
RunnersHeart4 screens

Verdict

The call

The clearest difference is price: ardi at Free against RunnersHeart's $1.99. ardi also leads on update cadence (weekly vs every 2 weeks) and iOS requirement (15.0 vs 26.0). On ads, in-app purchases 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

ardi is free to download; RunnersHeart costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

ardi ships an update weekly, RunnersHeart every 2 weeks. The most recent releases landed on October 25, 2026 and October 31, 2026 respectively.

Scorecard3 real differences · 3 level
ardi versus RunnersHeart: the parameters behind the verdict, then further details
ParameterardiRunnersHeart
PriceFree — better$1.99
Update frequencyWeekly — betterEvery 2 weeks
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPodiPhone, Apple Watch
Requires iOS15.0 — better26.0
Further details — not scored
Size102 MB19 MB
Age rating12+4+
DeveloperFlicfitoozoofrog

In-app purchases

None

ardi

No in-app purchases

None

RunnersHeart

No in-app purchases

Questions

Is ardi free?
ardi is free to download, with no in-app purchases.
Is RunnersHeart free?
RunnersHeart costs $1.99, with no in-app purchases.
Do ardi or RunnersHeart have ads?
Neither ardi nor RunnersHeart shows ads.
Which is updated more often, ardi or RunnersHeart?
ardi ships an update weekly, and RunnersHeart every 2 weeks. Most recently, ardi was updated on October 25, 2026 and RunnersHeart on October 31, 2026.

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