TZ iBoat vs Anchor Plus
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
TZ iBoat
Navigate coastal waters with advanced marine charts, GPS, and real-time data. Monitor AIS targets, plan routes, and access weather forecasts for safer boating, sailing, and fishing. Offers offline capabilities and community map sharing.
- Marine GPS and nautical charts
- AIS target monitoring
- Route planning and safe anchoring
- Tides, currents, and weather forecasts
- Offline chart access
- Community map sharing
- NMEA connectivity
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Your next-generation chartplotter. Navigate with the world’s #1 marine charts app for coastal boating, sailing, and fishing. Marine GPS, nautical charts, AIS Online, tides & tidal currents, anchoring, marine weather, radar, sounder, and NMEA data — everything you need for safer navigation at sea. Built for sailors, boaters, and fishermen who need reliable navigation anywhere, online or offline. THE SMARTEST AND CLEAREST NAVIGATION INTERFACE AT SEA A cutting-edge interface makes navigation clearer and faster: • TZ Bar: quick access to key features • Dedicated screens: Weather, Fishing, NavData, Logbook, Mooring, Tides, Sounder • Cleaner chart view, easier to read • Customizable interface for faster access • Modern design focused on readability WHAT YOU CAN DO WITH TZ iBoat • Navigate with marine GPS and nautical charts • Monitor AIS targets locally and globally • Plan routes and anchor safely • Access tides, currents, and weather forecasts • Fish smarter using oceanographic data FOR SAILORS & BOATERS – Navigate safely • TZ MAPS: vector, raster, satellite, and bathymetry charts • SMART SEARCH: find marinas, buoys, tide stations, routes • DYNAMIC LIGHTS: real-time light sectors • DYNAMIC MOORINGS: wind-aware anchorage • Precise GPS for coastal navigation AIS & SAFETY – Stay aware beyond your horizon • AIS ONLINE: global AIS targets via internet (Essential plan) • Share AIS data with the community • Radar and onboard instrument integration • Real-time traffic awareness for safer navigation FOR FISHERMEN – Gain the edge Turn ocean data into real fishing results: • Identify productive zones using SST, chlorophyll, currents, altimetry (Elite plan) • Spot fish-holding conditions faster • BATHYVISION: high-resolution bathymetry with contour lines • Target high-potential areas with precision • EVENT & CATCH: log and analyze catches on nautical charts WEATHER – Clearer and more useful • Dedicated Weather screen • Real-time forecasts and offline access • Rain Radar with lightning data • High-resolution models available in Premium plan • Iridium GO! compatibility CONNECTIVITY & PRECISION • NMEA connectivity: manage and prioritize data sources • Connect AIS, radar, autopilot, and instruments • Latitude/longitude keyboard optimized for use at sea • Easy coordinate entry with multiple formats COMMUNITY & ECOSYSTEM • COMMUNITY MAPS: share local knowledge (hazards, POIs, marinas) • Contribute and improve charts • Trusted by 500,000+ boaters worldwide SUBSCRIPTION PLANS Choose the plan that fits your needs: • Essential: AIS Online, onboard instruments, autopilot integration via Wi-Fi NMEA • Premium: Essential + high-resolution forecasts, Rain Radar, multiple models, comparison • Elite: Premium + ocean layers (SST, Chlorophyll, SSH, Currents). Monthly and annual plans available, with savings on yearly options. Core features remain available for free. CHARTS AND DATA PLANS SUBSCRIPTIONS: The payment will be debited from the Apple account once the purchase is confirmed. The subscriptions and automatic renewals can be managed by entering the account settings after making the purchase. Any unused part of a free trial period, if offered, will be lost when a subscription is purchased. Terms of use: https://mytimezero.com/eula/ Privacy policy: https://mytimezero.com/privacy-statement/
Anchor Plus
This app provides advanced anchor alarm functionality with features like Siri integration, Home Screen widgets, and Apple Watch control. It also includes weather forecasts, man overboard alerts, and a map view with drift history for enhanced safety and convenience while boating.
- Siri Shortcuts and voice commands
- iOS14 Home Screen widgets
- Apple Watch remote control
- Email status updates and alarm alerts
- Man Overboard (MOB) alerts
- Map view with drift history
- Current and 7-day weather forecast
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More than just an anchor alarm. Enjoy these great features: - Use Siri Shortcuts and voice commands to set the anchor alarm - Set the alarm during anchoring (current position) or afterwards (bearing & distance) or coordinates - Support for iOS14 Home Screen widgets - Day and night theme, metric or imperial, various alarms - Apple Watch remote control, set the anchor from your watch - Receive email status updates and alarm alerts on another device - Scan the QR code and monitor the anchor status from another device - Man Overboard provides bearing to steer and distance back to MOB point - Map view with drift history - Current and 7 day weather forecast with wind alerts - Tropical weather from the top severe weather providers around the globe - Compass and anchor retrieval tool with bearing and distance to anchor - Support for MFi external bluetooth GPS on WiFi only devices - Use the anchor assistant to determine the correct scope and provide a visual representation of where your vessel should be after the anchor is set - Switch language from with the app - Airdrop data to another device - Send text alerts to another device via WhatsApp or Signal
Screenshots
Verdict
The clearest difference is price: TZ iBoat at Free against Anchor Plus's $1.99. TZ iBoat also leads on ratings volume (887 vs 7) and update cadence (every 8 days vs monthly). Anchor Plus's advantage is in-app purchases (none vs 10) and review sentiment (100% vs 79%). On rating, 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
TZ iBoat is free to download; Anchor Plus costs $1.99 up front. TZ iBoat sells 10 in-app purchases, starting at $2.99 per month. Anchor Plus asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 4.6 for TZ iBoat against 4.7 for Anchor Plus. That said, the two scores are not equally well evidenced: TZ iBoat has 887 ratings behind it against 7, so its average is the more settled of the two. Written reviews are what separate them: 79% of TZ iBoat's written reviews are positive against 100% of Anchor Plus's.
TZ iBoat ships an update every 8 days, Anchor Plus monthly. The most recent releases landed on November 11, 2026 and November 7, 2026 respectively.
| Parameter | TZ iBoat | Anchor Plus |
|---|---|---|
| Price | Free — better | $1.99 |
| Rating | 4.6 (887 ratings) | 4.7 (7 ratings) — better |
| Positive reviews | 79.4% of reviews | 100.0% of reviews — better |
| Number of ratings | 887 — better | 7 |
| Update frequency | Every 8 days — better | Monthly |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases — better | Paid |
| Best chart rank | #97 — better | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Requires iOS | 14.2 — better | 17.6 |
| Further details — not scored | ||
| Size | 428 MB | 23 MB |
| Age rating | 4+ | 4+ |
| Developer | Nobeltec, Inc. | Roy Cadman |
Customer experience
TZ iBoat
Anchor Plus
Bugs and requests
TZ iBoat
Reported bugs
3 issues- GPS position not updating reliably while moving
- Radar overlay not functioning properly
- Compatibility issues with older devices or iOS versions
Requested features
5 requests- Automatic routing and trip planning
- Improved satellite imagery and overlays
- Better integration with other marine electronics
- More customization options for data displays
- Ability to mirror camera feeds as a rear-view
Anchor Plus
Not enough reviews yet to summarise bugs or requests.
In-app purchases
TZ iBoat
- Essential Subscription$2.991 Month
- Premium Subscription$9.991 Month
- Great Lakes7 Days trial$19.991 Year
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- Canada West7 Days trial$19.991 Year
- USA7 Days trial$19.991 Year
- Bahamas7 Days trial$30.991 Year
- Central America & Caribbean7 Days trial$30.991 Year
- Elite Subscription$39.991 Month
- AIS module$8.99
- Radar module$49.99
Anchor Plus
No in-app purchases








