Training Today vs Arc Timeline 4
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Training Today
This app analyzes your Apple Watch health data to provide a daily readiness to train score. It helps prevent overtraining injuries and guides your training intensity, offering insights into your body's recovery and performance potential.
- Calculates daily readiness to train (RTT) score
- Multi-day RTT score chart
- Independent Apple Watch app
- Uses HRV, workout detection, and custom algorithm
- Automatic data outlier filtering
- iPhone companion app with tutorial
- Complication support for quick RTT glance
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Take Readiness to Results. Understand your readiness. Choose training that fits today. Follow your progress over time. Training Today brings readiness and training together for triathletes, runners, cyclists and swimmers. Your Readiness to Train (RTT) score uses HRV readings from Apple Health and your personal baseline to help you decide when to push, keep steady or take it easy. FROM READINESS TO YOUR NEXT SESSION With Premium, explore structured swim, bike and run workouts that adapt to your RTT. Review the session, choose your options and send supported workouts to Apple Watch. Review readiness-based changes on iPhone before updating a workout on your Watch. BUILD YOUR TRAINING WEEK Shape Your Week around your training preferences. Choose sessions, move workouts and review suggestions as your week unfolds. Schedule strength and conditioning alongside your endurance training. CONNECT YOUR TRAINING Share readiness and health metrics with TrainingPeaks, with optional daily sync. Upload completed workouts separately from Workout Analytics after granting workout-upload access. Send supported cycling workouts to ROUVY. Choose power targets when configured, or free ride with heart-rate cues. Connected accounts and the relevant permissions are required. SEE THE BIGGER PICTURE Review recorded activities, readiness and HRV history. Use sleep context, Activity Intensity Score and Overall Fitness Index (OFI) trends to better understand your training. OFI is a personal HRV-based trend indicator, not a direct measurement of performance or VO2 max. START FREE. EXPLORE PREMIUM. Start with your readiness score, recent readiness chart, current sleep and resting heart rate, and recent OFI trends. Premium adds workout planning and the library, recorded activity review, deeper history, customization and integrations. Monthly, annual and lifetime purchase options unlock Premium; available options and local prices appear in the app. Training Today needs suitable Apple Health data to calculate readiness. Wear a compatible Apple Watch regularly, including overnight, and allow access to the health data you want to use. Watch workouts and other features depend on compatible devices and software. Your score supports training decisions: consider it alongside how you feel. Training Today does not provide medical advice, diagnosis or treatment. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula Privacy: https://trainingtodayapp.com/privacy
Arc Timeline 4
This app automatically tracks your location history, including how you travel and how long you stay at places. It learns your habits to provide a detailed, searchable timeline of your daily life, offering insights into your activity and health metrics.
- Automatic background location recording
- Smart learning engine for place recognition
- Detects over 20 activity types
- Searchable trip and place history
- Health and activity insights (heart rate, calories)
- Data stored on device with optional iCloud backup
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Arc Timeline automatically records where you go, how you get there, and how long you stay - all in the background, with no buttons to press. A smart learning engine gets more accurate the more you use it, building a detailed, searchable timeline of your daily life. Your trips, your places, your history - recorded effortlessly. WHAT ARC TIMELINE DOES ▸ Automatically detects and records your visits and trips ▸ Learns your places and recognises them by name ▸ Detects walking, running, cycling, driving, train, bus, airplane, and 20+ more activity types ▸ A learning engine that improves over time, personalised to you ▸ Search your entire history - find any place, any trip, any day BUILT FOR QUALITY ▸ High quality GPS data with advanced Kalman filtering ▸ Reliable background recording with intelligent sleep mode ▸ Built for iOS 26 with Liquid Glass design ▸ Full dark mode support YOUR DATA, YOUR DEVICE ▸ All data stored on your device ▸ Optional iCloud backup to your private iCloud account ▸ No accounts, no sign-ups, no data shared with third parties ▸ Export your data anytime in standard JSON format HEALTH & ACTIVITY INSIGHTS ▸ Heart rate, calories burned, steps, and altitude for every trip and visit ▸ Import workouts from Apple Health ▸ Sync visits to your calendar ▸ Places tab with visit history, occupancy charts, and geographic reports A free trial is included. An active subscription or lifetime purchase is required after the trial period. Terms of Use (EULA): https://www.bigpaua.com/arcapp/terms
Screenshots
Verdict
The clearest difference is rating: Training Today at 4.6 against Arc Timeline 4's 4.0. Training Today also leads on ratings volume (2.6K vs 27) and iOS requirement (16.0 vs 26.0). Arc Timeline 4's advantage is update cadence (weekly vs every 6 weeks). On price, review sentiment, ads and in-app purchases 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. Training Today sells 4 in-app purchases, starting at $2.95 per month and Arc Timeline 4 sells 3 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.
Training Today holds the better App Store score, 4.6 against 4.0. That said, the two scores are not equally well evidenced: Training Today has 2.6K ratings behind it against 27, so its average is the more settled of the two. Written reviews complicate that: 53% of Training Today's written reviews are positive against 59% of Arc Timeline 4's, so the app with the better star average is not the one people write more warmly about.
Training Today ships an update every 6 weeks, Arc Timeline 4 weekly. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.
| Parameter | Training Today | Arc Timeline 4 |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (2.6K ratings) — better | 4.0 (27 ratings) |
| Positive reviews | 52.5% of reviews | 59.0% of reviews — better |
| Number of ratings | 2.6K — better | 27 |
| Update frequency | Every 6 weeks | Weekly — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Freemium | Free with in-app purchases |
| Devices | iPhone, Apple Watch — better | iPhone |
| Requires iOS | 16.0 — better | 26.0 |
| Further details — not scored | ||
| Size | 48 MB | 68 MB |
| Age rating | 4+ | 4+ |
| Developer | Betoli Ltd | Matthew Bruce Greenfield |
Customer experience
Training Today
Arc Timeline 4
Bugs and requests
Training Today
Reported bugs
4 issues- Crashes on launch after purchasing subscription
- Widgets not working after recent updates
- Discrepancies between data shown on iPhone and Apple Watch
- Inability to get HRV readings without using the Breathe app
Requested features
6 requests- Extend the number of days shown on the chart
- Add more data points like sleep and oxygen levels
- Provide more detailed explanations of the metrics and how they are calculated
- Improve the Apple Watch complication to update more frequently
- Integrate with other fitness platforms like Garmin and Polar
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- Add training plans that adapt to HRV data
Arc Timeline 4
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Training Today
- Monthly subscription$2.951 Month
- Yearly subscription$29.991 Year
- Additional charts$5.99
- Lifetime$59.99
Arc Timeline 4
- Monthly Subscription7 Days trial$4.991 Month
- Yearly Subscription7 Days trial$44.991 Year
- Lifetime Purchase$219.99









