# iNavX vs DriftWatch

The clearest difference is ads: DriftWatch at none against iNavX's shown. DriftWatch also leads on review sentiment (67% vs 44%). iNavX's advantage is update cadence (every 5 weeks vs every 12 months) and chart position (#92 vs unranked). On price, in-app purchases, monetization model and device support there is nothing between them.

Both are free to download. iNavX sells 11 in-app purchases, starting at $9.99 per month and DriftWatch sells 3 in-app purchases, starting at $3.99 per year. Whichever you choose, the download price is not the number that matters.

iNavX ships an update every 5 weeks, DriftWatch every 12 months. The most recent releases landed on November 1, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | iNavX | DriftWatch |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (22K ratings)](https://appshunter.io/ios/app/inavx-marine-navigation/id286616280/reviews)** | — |
| Number of ratings | **22K** | — |
| Positive reviews | 43.8% of reviews | **66.7% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 5 weeks** | Every 12 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Best chart rank | **#92** | — |
| Size | 298 MB | 85 MB |
| Requires iOS | **13.0** | 17.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [NavX Studios LLC](https://appshunter.io/developer/286616283) | [Rene Dacier](https://appshunter.io/developer/1001235750) |

## What reviewers say

### iNavX

[App page](https://appshunter.io/ios/app/inavx-marine-navigation/id286616280)

**Currently charting:** #92 Top Grossing · Navigation (US App Store)

This app provides comprehensive marine navigation tools, including worldwide chart coverage, weather forecasts, and AIS integration. It allows users to plan routes, track their position, and connect with onboard instruments for a complete boating experience.

**Highlights:** Worldwide marine chart access, Real-time GPS plotting, Waypoint and route management, GRIB weather forecasts, AIS integration, Nautical instrument connectivity

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (11)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Theyr Premium - Mobile (Monthly) for iOS | $9.99 | per month |
| iNavX Professional+ USA | $29.99 | per year |
| Navionics+ USA/Canada (iPhone) | $29.99 | per year |
| Navionics+ Caribbean (iPhone) | $44.99 | per year |
| Theyr Premium Weather | $49.99 | per year |
| iNavX Professional+ USA Canada | $59.99 | per year |
| C-MAP World Chart | $59.99 | per year |
| Explorer Chartbooks - Bahamas | $69.99 | per year |
| Navionics+ USA/Canada (iPad) | $79.99 | per year |
| Navionics+ Caribbean (iPad) | $79.99 | per year |
| AIS Live | $99.99 | per year |

**What reviewers like**

- 🚀 Accurate and precise navigation
- 📊 Comprehensive charting and navigation features
- 🛠️ Customizable instrument settings
- 🔄 Redundancy across devices
- 💨 Reliable performance over many years

**What reviewers complain about**

- 🤔 Clunky and unintuitive user interface
- 🗺️ Cumbersome chart management and downloading
- 🔋 Battery drain issues
- 💰 Expensive subscription model for charts
- 🐛 Stability issues and crashes

**Reported bugs**

- Inability to remove waypoints
- Inconsistent behavior when transitioning International Date Line
- Disappearing or missing chart data

**Requested features**

- Seamless chart switching and panning
- Integrated tidal and current data
- Support for more chart types and providers
- Improved route planning and editing tools
- Automatic chart updates and management


### DriftWatch

[App page](https://appshunter.io/ios/app/driftwatch/id1001235751)

This navigation app helps boat captains sleep soundly by monitoring anchor drift. It uses your device's GPS to alert you if your vessel moves outside a set boundary, providing peace of mind while at anchor.

**Highlights:** Anchor drift monitoring, GPS boundary alerts, Audible alarms, Battery level monitoring, Simple and easy to use

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Time Limit | $3.99 | per year |
| 24H Wind Forecast | $9.99 | per year |
| 24H Wind Forecast. | $9.99 | per year |


## Frequently asked questions

### Is iNavX free?

iNavX is free to download, with in-app purchases available.

### Is DriftWatch free?

DriftWatch is free to download, with in-app purchases available.

### Do iNavX or DriftWatch have ads?

iNavX shows ads; DriftWatch does not.

### Which is updated more often, iNavX or DriftWatch?

iNavX ships an update every 5 weeks, and DriftWatch every 12 months. Most recently, iNavX was updated on November 1, 2026 and DriftWatch on October 20, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*