# DRUIDapp vs MRB Navigator

The clearest difference is review sentiment: MRB Navigator at 100% against DRUIDapp's 53%. MRB Navigator also leads on rating (5.0 vs 3.9). DRUIDapp's advantage is ratings volume (164 vs 10). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. DRUIDapp sells 2 one-off in-app purchases and MRB Navigator sells 2 in-app purchases, starting at $8.99 per month. Whichever you choose, the download price is not the number that matters.

MRB Navigator holds the better App Store score, 5.0 against 3.9. That said, the two scores are not equally well evidenced: DRUIDapp has 164 ratings behind it against 10, so its average is the more settled of the two. Written reviews point the same way: 53% of DRUIDapp's written reviews are positive against 100% of MRB Navigator's.

DRUIDapp ships an update monthly, MRB Navigator every 5 weeks. The most recent releases landed on September 13, 2026 and July 6, 2026 respectively.

## The numbers

| Metric | DRUIDapp | MRB Navigator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.9 (164 ratings)](https://appshunter.io/ios/app/druidapp/id1107595146/reviews) | **[5.0 (10 ratings)](https://appshunter.io/ios/app/mrb-navigator/id6742063073/reviews)** |
| Number of ratings | **164** | 10 |
| Positive reviews | 52.9% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Monthly** | Every 5 weeks |
| Monetization | Free with in-app purchases | Freemium |
| Size | 82 MB | 32 MB |
| Requires iOS | 16.6 | **16** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Impairment Science, Inc.](https://appshunter.io/developer/1288634284) | [Nick Ironfield](https://appshunter.io/developer/1796632833) |

## What reviewers say

### DRUIDapp

[App page](https://appshunter.io/ios/app/druidapp/id1107595146)

This app assesses cognitive and motor function impairment using neuroscience-based tests. It offers quick or benchmark assessments to detect impairment from various causes like drugs, alcohol, fatigue, or illness. A workplace version with management controls is also available.

**Highlights:** Cognitive and motor function assessment, 1-minute Rapid Test, 3-minute Benchmark Test, Detects impairment from various causes, Neuroscience-based technology, Workplace management controls available

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| DRUID Premium | $1.99 | one-time |
| DRUID Premium | $14.99 | one-time |


### MRB Navigator

[App page](https://appshunter.io/ios/app/mrb-navigator/id6742063073)

This app provides real-time marine conditions, tides, wind, and weather forecasts for boaters on the North Shore & Seacoast. It offers community reports, webcam access, location sharing, and safety resources. Manage your boat's maintenance and discover local events and resources.

**Highlights:** Live marine conditions, Marine advisory notifications, Community reports, Local webcams, Location sharing, Emergency resources, Boat maintenance tracking

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| MRB Premium Subscription | $8.99 | per month |
| MRB Premium Subscription | $49.99 | per year |


## Frequently asked questions

### Is DRUIDapp free?

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

### Is MRB Navigator free?

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

### Which has better reviews, DRUIDapp or MRB Navigator?

MRB Navigator is rated higher. DRUIDapp averages 3.9 out of 5 from 164 ratings, while MRB Navigator averages 5.0 from 10 ratings.

### Do DRUIDapp or MRB Navigator have ads?

Neither DRUIDapp nor MRB Navigator shows ads.

### Which is updated more often, DRUIDapp or MRB Navigator?

DRUIDapp ships an update monthly, and MRB Navigator every 5 weeks. Most recently, DRUIDapp was updated on September 13, 2026 and MRB Navigator on July 6, 2026.

---

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