ALDS vs Engine
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
ALDS
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The ALDS (Ambulatory Lung Diagnostic System) combines oscillometry, FeNO, and spirometry to enable fast and comprehensive respiratory assessment. Its cloud-based algorithms evaluate measurement data alongside patient history to support the physiological interpretation of obstructive, restrictive, and inflammatory patterns. Designed for use in primary and outpatient care, the system enables efficient, non-invasive assessments within minutes and supports clinicians in the evaluation and management of respiratory conditions.
Engine
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Train Smarter. Run Stronger. Engine is a running companion built to help you boost your VOβ max and unlock real endurance gains β without guesswork. Through personalized training plans and guided runs, Engine gives you the right workout at the right time, so every session actually moves your fitness forward. Designed for runners who want measurable progress, not random mileage, Engine turns every run into a step toward higher performance and stronger confidence. Features Youβll Love: - VOβ Max Running Plans: Get personalized running plans designed specifically to improve your VOβ max, endurance, and efficiency. - Guided Run Player: Hit start and let Engine guide your session β pace cues, structure, and automatic tracking included. - Clear Performance Insights: Visualize your VOβ max, endurance, and consistency with clean stats and easy-to-read trends. - Train With Confidence: Know why youβre running each workout β and how itβs pushing your fitness higher. Turn Every Run Into Progress. Each workout has a purpose. No junk miles, no overthinking. Download Engine and watch your fitness rise. Run focused. Build power. Go further. A subscription is required to access the full app experience and features. Terms of Use: https://legal.rocapine.com/terms Privacy policy: https://legal.rocapine.com/privacy
Screenshots
Verdict
The clearest difference is in-app purchases: ALDS at none against Engine's 2. ALDS also leads on ads (none vs shown). Engine's advantage is update cadence (every 10 days vs every 6 months). On price, device support and iOS requirement there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. Engine sells 2 in-app purchases, starting at $9.99 per month. ALDS asks for nothing beyond the download.
ALDS ships an update every 6 months, Engine every 10 days. The most recent releases landed on October 27, 2026 and September 30, 2026 respectively.
| Parameter | ALDS | Engine |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 6 months | Every 10 days β better |
| Ads | No β better | Yes |
| In-app purchases | No β better | Yes |
| Devices | iPhone, iPad, iPod β better | iPhone, iPod |
| Requires iOS | 15.0 β better | 15.1 |
| Further details β not scored | ||
| Size | 24 MB | 54 MB |
| Age rating | 17+ | 4+ |
| Developer | LOTHAR MEDTEC GmbH | Les Nants |
In-app purchases
ALDS
No in-app purchases
Engine
- Monthly Plan$9.991 Month
- Yearly Plan7 Days trial$39.991 Year









