Subintervals vs Lactate Training
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Subintervals
Visualize your training data with detailed displays and interactive graphs. Customize your analysis and sync seamlessly with intervals.icu for up-to-the-minute insights into activities, events, and performance metrics.
- Detailed activity and event visualization
- Interactive performance graphs
- Seamless intervals.icu sync
- Customizable data analysis
- Actionable training insights
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Elevate Your Training with Subintervals Subintervals transforms your intervals.icu data into actionable insights. This app brings your training activities, events, and performance metrics to life through detailed displays and interactive graphs. Customise and control your data for a tailored analysis, and seamlessly sync with intervals.icu for up-to-the-minute information. Key Features: - Detailed visualisation of activities and events. - Dynamic, interactive graphs for performance tracking. - Effortless sync with intervals.icu. Please note that it is an independent application developed by an enthusiast keen on providing a complementary tool to the official platform.
Lactate Training
This intelligent training system connects your sessions, recovery, fatigue, and life stress into an AI-driven coaching platform. It helps athletes train smarter, avoid injury, and improve consistently by analyzing data and providing personalized feedback. The app offers a complete dashboard for tracking fitness, fatigue, and performance trends.
- AI-driven personalized coaching
- Fitness vs. fatigue tracking
- Daily check-ins for readiness
- Smart training calendar with life event integration
- Session comparison for progress analysis
- Blood lactate integration for training zones
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Lactate Training — The Operating System For Your Training Most athletes are guessing. The best athletes measure, track, and adapt. Lactate Training is your intelligent training system that connects everything — your sessions, recovery, fatigue, life stress and goals — into one powerful AI-driven coaching platform. This isn’t just another training log. It’s a complete operating system for your performance. Train smarter. Avoid injury. Improve consistently. WHY LACTATE TRAINING? Because what you’ve done doesn’t matter unless you understand what it’s doing to you. Lactate Training connects your past training, how you feel today, and what’s coming next — so you can make better decisions every single day. See your fitness build. Spot fatigue early. Adjust before injury hits. Stay consistent and keep progressing. AI COACHING THAT ACTUALLY UNDERSTANDS YOU Your AI coach analyses your training, recovery, and daily check-ins to give real, personalised feedback. • Session analysis after every workout • Detect fatigue before it becomes injury • Suggest smarter training decisions • Compare similar sessions to track improvement • Identify trends in performance and recovery • Clear, simple feedback you can actually use It’s like having a world-class coach in your pocket. YOUR COMPLETE TRAINING DASHBOARD See everything in one place. • Fitness vs fatigue tracking • Training load & intensity distribution • Performance trends over time • Heart rate & pace insights • Long-term progress tracking • Clear visual dashboard with actionable insights Know when to push. Know when to hold back. Know when you’re improving. DAILY CHECK-INS THAT PREVENT OVERTRAINING The most powerful habit for staying injury-free. Your daily physical and mental check-in connects how you feel with your training load so you can adjust before problems build. • 10-second daily check-in • Physical & mental readiness tracking • Early fatigue detection • Smarter training suggestions • Build consistency with daily streaks Small habit. Massive long-term gains. PLAN YOUR TRAINING AROUND REAL LIFE Training shouldn’t ignore your life — it should work with it. • Smart training calendar • Move, edit and plan sessions easily • Add work, travel & life events • Import future sessions from Garmin & Strava • Create default sessions for quick planning • AI suggestions based on your load & recovery Your training finally adapts to your life. COMPARE SESSIONS & SEE REAL PROGRESS Tag key sessions and compare them instantly. See how you’re actually improving: • Pace vs heart rate • Power & efficiency • Cadence & biomechanics • Heat vs cool conditions • Different shoes or equipment • Fatigue vs fitness Turn every session into learning. BLOOD LACTATE & TRUE TRAINING ZONES Train with precision. Connect your blood lactate testing to unlock: • Accurate heart rate zones • True threshold data • Personalised training intensities • Smarter endurance development • Data-driven performance gains Train like the pros — with real numbers. BUILT FOR ATHLETES WHO WANT MORE Whether you run, cycle, train hybrid, or just want to improve without burnout — this app helps you stay consistent and keep progressing. No guesswork. No generic plans. No blind training. Just clear insights, smart coaching, and one connected system guiding your training every day. AI Access subscription: £9.95/month or £89.95/year, with a free trial. Payment is charged to your Apple ID at purchase confirmation. Auto-renews unless cancelled at least 24h before the period ends. Manage/cancel in your Apple ID account settings. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://lactatetraining.ai/policies/privacy-policy
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Verdict
The clearest difference is rating: Subintervals at 5.0 against Lactate Training's 4.0. Subintervals also leads on review sentiment (100% vs 75%). Lactate Training's advantage is monetization model (free vs free with in-app purchases). On price, ratings volume, update cadence and ads 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
Both are free to download. Subintervals sells 4 one-off in-app purchases and Lactate Training sells 2 in-app purchases, starting at $9.95 per month. Whichever you choose, the download price is not the number that matters.
Subintervals holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 2 and 2 respectively. Written reviews point the same way: 100% of Subintervals's written reviews are positive against 75% of Lactate Training's.
Subintervals ships an update weekly, Lactate Training every 9 days. The most recent releases landed on September 29, 2026 and October 3, 2026 respectively.
| Parameter | Subintervals | Lactate Training |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) — better | 4.0 (2 ratings) |
| Positive reviews | 100.0% of reviews — better | 75.0% of reviews |
| Number of ratings | 2 | 2 |
| Update frequency | Weekly — better | Every 9 days |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.1 | 15.0 — better |
| Further details — not scored | ||
| Size | 95 MB | 145 MB |
| Age rating | 4+ | 4+ |
| Developer | Inaki Arroyo Nebreda | Barney Reed |
Customer experience
Subintervals
Lactate Training
In-app purchases
Subintervals
- Coffee$3.99
- Lunch$11.99
- Big Thanks$17.99
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- Sponsor$44.99
Lactate Training
- AI Access (Monthly)7 Days trial$9.951 Month
- AI Access (Yearly)1 Month trial$99.991 Year









