Watta vs Asensei: Erg Analytics vs AI Coaching
By the Watta Team · Updated March 2026
Quick Verdict
Asensei is a real-time AI coaching app that connects to your Concept2 via Bluetooth and provides live form feedback and guided workouts. It excels at coaching beginners through technique cues during the session. Watta takes a different approach — capturing your PM5 screen with AI OCR and analysing the session holistically with a multi-factor Effort Score. If you want a live coach in your ear, Asensei is compelling. If you want deep post-session analytics, training trends, and social features without a subscription, Watta is the better fit.
Feature Comparison
| Feature | Watta | Asensei |
|---|---|---|
| Data Capture Method | AI OCR — photograph your PM5 screen for instant data extraction without Bluetooth | Bluetooth connection to PM5 for real-time data streaming during the session |
| Coaching | Post-session Effort Score with breakdown of cardiac load, work output, pacing, and economy | Real-time AI coaching with live form cues, pacing guidance, and technique feedback |
| Effort Scoring | 0-100 Effort Score combining four rowing-specific components | No composite effort metric; uses pace targets and coaching feedback |
| Workout Library | Log any workout type — steady state, intervals, tests, or custom sessions | Guided workout library with structured programmes and coaching plans |
| Social Features | Clubs, squads, social feed, and leaderboards | Limited social features; primarily a solo coaching experience |
| Heart Rate Zones | Five personalised Karvonen-based zones with resting and max HR inputs | Heart rate integration available with compatible monitors |
| Price | Free | Subscription required for full coaching features |
| Platform | iOS | iOS and Android |
Why Choose Watta
- +Completely free with no subscription — full analytics, Effort Score, and social features included
- +AI OCR works without Bluetooth, meaning no pairing issues and instant capture from any Concept2 PM5
- +Multi-factor Effort Score provides a holistic session quality metric that live coaching cannot replicate
Where Asensei Excels
- +Real-time AI coaching provides in-session technique cues and pacing guidance
- +Structured training programmes guide beginners through progressive workout plans
- +Live Bluetooth connection captures stroke-by-stroke data during the session
Detailed Breakdown
Asensei and Watta serve different needs within the rowing app space. Asensei is best understood as a virtual rowing coach — it connects to your Concept2 via Bluetooth, listens to your stroke data in real time, and provides audio cues to improve technique and pacing. For beginners who have no coaching and want guided sessions, this is genuinely valuable. However, Asensei requires a subscription for full access, has limited post-session analytics, and offers minimal social features. Watta approaches erg training from the analytics side. The AI OCR captures your PM5 data without any Bluetooth setup — just photograph the screen. The Effort Score then rates your session across cardiac load (40%), work output (35%), pacing consistency (15%), and stroke economy (10%), giving you a comprehensive quality metric that improves over time. Clubs, squads, and leaderboards add social motivation. For rowers who already know how to row and want deeper insight into their training, Watta provides more analytical value at no cost.
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