Mobile Guard Sentrynet vs SentryBlack
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
Mobile Guard Sentrynet
Read full descriptionHide full description
MobileGuard helps you observe your iPhoneβs network behavior and identify signals that may deserve attention through time-limited VPN analysis sessions started voluntarily by the user. TRAFFIC MONITORING AND ALERTS During a session, MobileGuard analyzes traffic metadata and the ratio between data sent and received. Persistent upload activity while the phone is idle, small frequent transmissions, or sudden outbound spikes may indicate unusual synchronization, automated activity, or potential data-exfiltration patterns. Indicators are checked against international threat-intelligence datasets to highlight potentially malicious destinations, infrastructure associated with malware or Command & Control servers, and behavior compatible with spyware. MobileGuard generates alerts and a security report to help you understand the detected destinations, volumes, timing, and risk level. An anomaly does not automatically prove that a device has been compromised. Modern apps communicate in the background and can produce legitimate variations. MobileGuard highlights trends and indicators that may require further investigation instead of drawing conclusions from a single event. PRIVACY BY DESIGN Analysis is limited to the technical and security metadata required to provide the service, such as destination IP address and port, protocol, hostname when available, country, session timing and duration, traffic volumes, and risk indicators. MobileGuard does not inspect or store packet payloads, messages or communication content, passwords, payment-card data, full URLs, or URL parameters. Navigation metadata is used exclusively to identify potentially malicious destinations or anomalous traffic and to generate the alerts and reports requested by the user. The VPN session metadata required to provide the service is stored on MobileGuard servers. It is not sold, used for advertising or profiling, or shared with advertising networks, data brokers, or analytics services. If notifications are enabled, Firebase is used only for delivery and receives no VPN data. MobileGuard is a professional network-security analysis tool. Its report can be reviewed by cybersecurity experts to evaluate the context and assess whether the detected connections are legitimate. YOU REMAIN IN CONTROL You decide when to start an analysis session and can stop it at any time. Ten-minute analysis units are available as a consumable in-app purchase. From Settings, you can review the VPN disclosure, manage purchases, sign out, or permanently delete your account and associated data. MobileGuard provides security indicators and analytical support. It does not replace antivirus software, a forensic examination, or advice from a qualified security professional.
SentryBlack
Read full descriptionHide full description
Turn your own iPhone, iPad, or Mac into a private home security camera. Set an old device to watch a room and its screen dims to a discreet dark monitor view β one that always shows a clear recording indicator, so it is never hidden β while it detects motion, saves event clips, and streams live to your other devices. Wake it any time with a press-and-hold. PRIVATE BY DESIGN Unlike typical CCTV apps, SentryBlack has no company servers watching your home. Your video stays on YOUR devices and YOUR own private iCloud β never our cloud, and never a third-party cloud you did not choose. β’ Live view goes device-to-device and is end-to-end encrypted. β’ If your network blocks a direct connection, you can optionally add a relay server of your own β the video through it stays end-to-end encrypted and the relay cannot decrypt it. SentryBlack provides no relay server, and this setting is off unless you fill it in. β’ Cameras, motion alerts, and clips sync only through your private iCloud. β’ No account, no sign-up, no tracking. USE ANY DEVICE AS A CAMERA β’ The screen dims to a dark monitor view with an always-on "REC" indicator and timer β discreet and power-saving, but never blank. β’ On-device motion detection saves a clip and snapshot of every event. β’ Press and hold to wake the screen. MONITOR FROM ANYWHERE β’ On another device signed into the same iCloud, tap Monitor to see all your cameras. β’ Get instant push alerts with a snapshot the moment motion is detected. β’ Watch live video β fastest on the same Wi-Fi, and end-to-end encrypted everywhere. SENTRYBLACK PRO The free version records with motion detection, sends cross-device alerts, and streams live on your Wi-Fi (with a small banner ad on non-camera screens; iPhone and iPad only β the Mac app has no ads). SentryBlack Pro adds: β’ Cloud clip backup to your own iCloud β’ Unlimited event history β’ HD live view β’ Person detection & motion zones β’ Multiple cameras β’ No ads Pro is an auto-renewing subscription (monthly or yearly) with a 3-day free trial. One subscription works on iPhone, iPad, and Mac. Payment is charged to your Apple Account; it renews automatically unless cancelled at least 24 hours before the period ends. Manage or cancel anytime in Settings. Note: because Apple stops the camera when an app is in the background or the device is locked, a camera device must stay on and in the app while on duty β keeping it plugged in is recommended. Please use SentryBlack only to monitor your own property and spaces. Terms: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy: https://mwsupplylimited.github.io/sentryblack/privacy.html
Screenshots
Verdict
The clearest difference is ads: Mobile Guard Sentrynet at none against SentryBlack's shown. Mobile Guard Sentrynet also leads on update cadence (daily vs fortnightly). SentryBlack's advantage is device support (3 vs 1) and iOS requirement (17.0 vs 26.0). On price and in-app purchases 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. Mobile Guard Sentrynet sells 1 one-off in-app purchase and SentryBlack sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.
Mobile Guard Sentrynet ships an update daily, SentryBlack fortnightly. The most recent releases landed on September 18, 2026 and August 23, 2026 respectively.
| Parameter | Mobile Guard Sentrynet | SentryBlack |
|---|---|---|
| Price | Free | Free |
| Update frequency | Daily β better | Fortnightly |
| Ads | No β better | Yes |
| In-app purchases | Yes | Yes |
| Devices | iPhone | iPhone, iPad, Mac β better |
| Requires iOS | 26.0 | 17.0 β better |
| Further details β not scored | ||
| Size | 6 MB | 17 MB |
| Age rating | 4+ | 4+ |
| Developer | Sentrynet Srl | Matthew Wong |
In-app purchases
Mobile Guard Sentrynet
- 10-minute analysis units$3.99
SentryBlack
- SentryBlack Pro (Monthly)3 Days trial$4.991 Month
- SentryBlack Pro (Yearly)3 Days trial$29.991 Year





