Prevent vs Hydrolock
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Prevent
This app pairs with a special mouthguard to monitor head impacts in real-time. It provides detailed data on acceleration, direction, and load for each impact, helping teams and parents assess player safety and identify athletes needing evaluation.
- Real-time head impact data
- Linear and rotational acceleration tracking
- Impact direction and location analysis
- Impact Load measurement
- Player and team data views
- Live alerts for high-magnitude impacts
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The Prevent mobile app pairs with the Prevent Biometrics impact monitor mouthguard. The Prevent system provides near real-time, accurate head impact data to help teams make the right call about player safety. The Prevent app is designed for sideline monitoring of head impacts for the whole team, and is typically used by athletic trainers, coaches and athlete parents. For every head impact, see five key impact characteristics: * Linear acceleration of the head * Rotational acceleration of the head * Direction of the impact * Location on the head of the impact * Impact Load (a composite measure factoring impact count and magnitude) View head impact data on a player or team basis, and over the timeframe of a day, week or sports season. Introduce actionable, objective data into the process of identifying athletes needing sideline evaluation. The Prevent app provides live alerts of high magnitude head impacts. See athletes with high head impact exposure and instruct them on safer playing technique. Stand for smart play. The Prevent system helps you understand head impacts across the team and organization and be a leader in improving sports safety, performance and growing the game. This app requires at least one Prevent Impact Monitor Mouthguard to operate. Learn more at preventbiometrics.com or contact sales@preventbiometrics.com.
Hydrolock
This app encourages healthy hydration by integrating with your device's screen time data. It prompts you to drink water before allowing access to other applications, with options to unlock access for various durations.
- Integrates with Screen Time data
- Prompts water intake before app access
- Unlock app access for set durations
- Encourages healthy hydration habits
- Subscription for full features
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Dehydration is the leading cause of low energy. Turn your social media addiction into a healthy habit with Hydrolock: 1) Download Hydrolock 2) Connect your Screen Time data* 3) When you open an app, we make you take a drink of water! You can unlock for 5, 30, 60 minutes, or for the rest of the day. Questions? Email -> carter@carter.red *Hydrolock Core is required for access. Consider Hydrolock Core and enjoy full access to all features and content. If you choose a Hydrolock Core subscription, payment will be charged to iTunes Account at confirmation of purchase. The subscription will automatically renew unless turned off in your iTunes Account Settings at least 24 hours before the current period ends. From iTunes Account settings you can manage your subscription and turn off auto-renew. Your iTunes Account will be charged when the purchase is confirmed. If you subscribe before your trial ends, the remaining free trial period will be forfeited when your purchase is confirmed. App locking requires an active subscription. ----- Terms of service: https://hydrolock.carter.red/terms Privacy policy: https://hydrolock.carter.red/privacy Made by -> x.com/__carter
Screenshots
Verdict
The clearest difference is rating: Prevent at 5.0 against Hydrolock's 2.0. Prevent also leads on in-app purchases (none vs 2) and ads (none vs shown). On price, review sentiment, device support and iOS requirement 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. Hydrolock sells 2 in-app purchases, starting at $7.99 per 7 days. Prevent asks for nothing beyond the download.
Prevent holds the better App Store score, 5.0 against 2.0. That said, the two scores are not equally well evidenced: Prevent has 9 ratings behind it against 1, so its average is the more settled of the two. Written reviews split almost evenly too, at 100% and 100% positive.
| Parameter | Prevent | Hydrolock |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (9 ratings) — better | 2.0 (1 ratings) |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 9 — better | 1 |
| Update frequency | Monthly | — |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 16.4 | 15.1 — better |
| Further details — not scored | ||
| Size | 46 MB | 59 MB |
| Age rating | 4+ | 4+ |
| Developer | Prevent Biometrics, Inc | Carter Annandale |
Customer experience
Prevent
Hydrolock
In-app purchases
Prevent
No in-app purchases
Hydrolock
- Hydrolock$7.997 Days
- Hydrolock3 Days trial$49.991 Year









