Sit(x) Mobile vs SENTINEL TacMap
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Sit(x) Mobile
Enhance your team's situational awareness with real-time map visualization and communication tools. Track operators, share messages, and view video feeds on a secure platform. Originally developed for military use, it's now available for diverse organizations.
- Real-time moving map display
- Operator tracking
- Contact management
- Group and private messaging
- Video feed viewing
- SOS incident location
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Sit(x) Mobile is your mobile situational awareness solution for any situation. This simple, scalable and secure solution is delivered by Booz Allen Hamilton, the same company who brought you the Team Awareness Kit/Tactical Assault Kit. For the first time, iOS users have the ability to operate in real time on a moving map display that allows you to visualize real time data. What started as a military software requirement for United States Special Operations Forces over a decade ago is now a commercially available piece of technology available to everyone globally. Download this application today to enhance your geospatial visualization and situational awareness for whatever it is you and your team are tasked with. Sit(x) Mobile allows you to see your organization's operators on a map, view contacts, send and receive group and private messages, view video feeds, and locate SOS Incidents. Sit(x) is used operationally by hundreds of organizations including federal agencies, police departments, fire departments, public safety departments, non-profit organizations, and more.
SENTINEL TacMap
This app provides advanced mission planning, navigation, and secure team communication tools. It offers features like GRG generation, line-of-sight analysis, and live position sharing with end-to-end encryption for enhanced operational coordination.
- Gridded Reference Graphic (GRG) generation
- Line-of-sight and terrain masking analysis
- Live position sharing with end-to-end encryption
- MGRS navigation with topographic basemaps
- Shared waypoints and overlays with live sync
- Import/export KML/KMZ and CoT data
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Sentinel is a mission planning, navigation, and team coordination platform for iPhone. Build the plan, run the mission, and keep every operator on the same picture — with end-to-end encrypted comms and live position sharing. MISSION PLANNING The math and products that normally cost you a laptop, a protractor, and time you don’t have: • Gridded Reference Graphic (GRG) generation over any structure or area • Line-of-sight and terrain masking analysis between any two points • Helicopter landing zone assessment — size, slope, and obstructions • MEDEVAC 9-Line builder with formatted, transmittable output • Range, bearing, and elevation profile between any two points NAVIGATION • MGRS • USGS topographic and imagery basemaps • Route legs with distance, bearing, and running time • Waypoint capture, edit, and bulk management ENCRYPTED TEAM COMMS Team chat secured end to end. Your traffic is unreadable to anyone outside your team, including us. Messages queue when a member drops out of coverage and deliver the moment they’re back. SATELLITE-READY Where your carrier delivers satellite data to apps (direct-to-cell on supported iPhones), SENTINEL detects the satellite link and switches to a low-bandwidth mode on its own — position reports and team messages keep moving, and map downloads wait for a full-strength connection. POSITION LOCATION INFORMATION Live PLI across the team on a shared map. See where everyone is, in real time, without a TOC, a laptop, or a tech in the truck. Set update intervals to balance fidelity against battery and bandwidth. SHARED DATA Drop it once and the whole team has it. Waypoints, hazards, rally points, objectives, and custom markers sync across every device on the mission — so the picture on your screen is the picture on theirs. • Shared waypoints and overlays with live sync • MBTiles and GeoPackage import for your own map products • Export mission data for after-action review and reporting WHO USES SENTINEL • Volunteer and county search & rescue teams • Emergency management and incident command • Law enforcement tactical and special operations units • Wildland fire and remote-area EMS • Backcountry hunters, overlanders, and expedition teams WORKS WITH YOUR ECOSYSTEM • Import and export KML/KMZ files and CoT data packages • Bundle markers, graphics, and ops data into packages and share them with your team in seconds • Runs on iPhone, iPad, and Mac with one subscription YOUR DATA STAYS YOURS • End-to-end encryption for team content — the server relays ciphertext it cannot read • No ads, no tracking, no selling data • Location sharing is opt-in, visible, and instantly revocable • Delete your account and its data in-app at any time SENTINEL PRO Your first 14 days are free, with no card needed. After that, SENTINEL Pro is $9.99 a year. One subscription unlocks the full app on all your devices. Subscriptions renew automatically until canceled; cancel any time in Settings → Apple Account → Subscriptions at least 24 hours before the period ends. Terms of Use: https://strikeapps.github.io/sentinel-legal/terms.html Privacy Policy: https://strikeapps.github.io/sentinel-legal/privacy.html A NOTE ON SAFETY SENTINEL is a coordination tool that supports trained judgment — it is not a substitute for proper training, equipment, or agency procedures. Always carry backup navigation and communication for life-safety operations. BUILT BY SOMEONE WHO USES IT Sentinel was built by a working operator tired of stitching together four apps, a laminated card, and a Sharpie to do one job. Every tool here exists because it was needed on an actual mission. PRIVACY Team communications are end-to-end encrypted. We can’t read your messages, your positions, or your mission data. No ad networks. No data brokers. No selling your location.
Screenshots
Verdict
The clearest difference is rating: SENTINEL TacMap at 5.0 against Sit(x) Mobile's 4.4. SENTINEL TacMap also leads on update cadence (every 4 days vs monthly). Sit(x) Mobile's advantage is in-app purchases (none vs 2) and ratings volume (8 vs 1). On price, ads and device support 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. SENTINEL TacMap sells 2 in-app purchases, starting at $5.99 per month. Sit(x) Mobile asks for nothing beyond the download.
SENTINEL TacMap holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: Sit(x) Mobile has 8 ratings behind it against 1, so its average is the more settled of the two.
Sit(x) Mobile ships an update monthly, SENTINEL TacMap every 4 days. The most recent releases landed on October 8, 2026 and October 7, 2026 respectively.
| Parameter | Sit(x) Mobile | SENTINEL TacMap |
|---|---|---|
| Price | Free | Free |
| Rating | 4.4 (8 ratings) | 5.0 (1 ratings) — better |
| Number of ratings | 8 — better | 1 |
| Update frequency | Monthly | Every 4 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Freemium |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Requires iOS | 14.0 — better | 26.2 |
| Further details — not scored | ||
| Size | 183 MB | 10 MB |
| Age rating | 17+ | 4+ |
| Developer | Booz Allen Hamilton Inc. | JEREMY MITER |
Customer experience
Sit(x) Mobile
SENTINEL TacMap
In-app purchases
Sit(x) Mobile
No in-app purchases
SENTINEL TacMap
- SENTINEL TacMap14 Days trial$5.991 Month
- SENTINEL TacMap14 Days trial$29.991 Year









