ardi vs RunnersHeart
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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。
RunnersHeart
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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
Verdict
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
ardi is free to download; RunnersHeart costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
ardi ships an update weekly, RunnersHeart every 2 weeks. The most recent releases landed on October 25, 2026 and October 31, 2026 respectively.
| Parameter | ardi | RunnersHeart |
|---|---|---|
| Price | Free — better | $1.99 |
| Update frequency | Weekly — better | Every 2 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPod | iPhone, Apple Watch |
| Requires iOS | 15.0 — better | 26.0 |
| Further details — not scored | ||
| Size | 102 MB | 19 MB |
| Age rating | 12+ | 4+ |
| Developer | Flicfit | oozoofrog |
In-app purchases
ardi
No in-app purchases
RunnersHeart
No in-app purchases









