Mobyx vs Relay Shield
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Mobyx
This mobile softphone utilizes advanced Voice over IP technology for clear calls over Wi-Fi, 3G, or 4G. It offers essential calling features while being optimized to conserve battery life. An existing account with the provider is required.
- Voice over IP technology
- High-quality calling
- Wi-Fi, 3G, 4G support
- Battery-saving optimization
- Essential calling features
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Mobyx is an innovative mobile softphone that uses cutting-edge "Voice over IP" technology for high-quality calling using Wi-Fi, 3G, or 4G. Mobyx has the popular calling features you need. Unlike many other calling apps, Mobyx is specially designed to avoid draining your phone's battery. Requires existing account with Mobyx VoIP provider.
Relay Shield
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Relay Shield is the companion app to Relay! It helps you keep unwanted content off your iPhone, in Safari and inside the apps that ordinary filters can't reach. Most blockers stop at a list of websites. Relay Shield adds on-device content detection and Screen Time controls, so the apps you choose to protect stay protected while you use them, not just when you avoid them. HOW IT WORKS Choose the apps and websites you want to protect. They stay locked until you start a monitoring session. During a session, Relay Shield periodically checks the screen for sensitive content. If it finds something, you get a warning notification first. If the content continues, a safety lock closes the protected apps for a cooldown period you set. EVERYTHING STAYS ON YOUR DEVICE Detection runs entirely on your iPhone using an on-device model. Screen images are never uploaded, and we never see them. The only thing that can leave your phone is an alert you've chosen to send. SCREEN TIME LIMITS AND SCHEDULES Set daily time limits and blocking schedules for any app or category, enforced by Apple's Screen Time framework. ACCOUNTABILITY, ON YOUR TERMS Relay Shield works alone, and it works better with someone in your corner. Connect your Relay account to send a supporter or your Relay team a red flag when sensitive content is detected. They get the signal that you could use a check-in, not a log of what you were doing. YOUR WHY Keep a photo, a message, a verse, or a self-care reminder inside Shield. It's the first thing you see when the safety lock activates. PASSCODE PROTECTION Set a PIN to protect your shielded app list and the safety lock, so an impulsive moment can't undo a decision you made when you were thinking clearly. FAST TO START Begin a monitoring session from Control Center, the Action Button, or a Home Screen quick action. Protection that takes one tap is protection you'll actually use. WHO IT'S FOR Anyone who wants stronger boundaries around explicit content and more intentional screen time, whether you're working on a habit, supporting your recovery, or just tired of blockers that are easy to switch off and hard to live with. IMPORTANT Relay Shield uses Apple's Screen Time and screen broadcast frameworks. Monitoring requires a one-time Screen Time authorization and a short setup, and Safari protection requires enabling the Relay Shield Safari extension. Relay Shield does not generate, host, or provide explicit content; it exists only to help you avoid it. Relay Shield is free to use. A Relay account is optional and only needed for supporter alerts.
Screenshots
Verdict
Mobyx and Relay Shield are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
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. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | Mobyx | Relay Shield |
|---|---|---|
| Price | Free | Free |
| Rating | 3.7 (19 ratings) — better | — |
| Positive reviews | 72.7% of reviews | — |
| Number of ratings | 19 — better | — |
| Update frequency | Every 2 months | — |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone | iPhone |
| Requires iOS | 16.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 109 MB | 60 MB |
| Age rating | 17+ | 4+ |
| Developer | Alex Ferdman | Relay Health Inc |
In-app purchases
Mobyx
No in-app purchases
Relay Shield
No in-app purchases









