# Nautilus GPS vs Level Tool

The clearest difference is rating: Level Tool at 3.9 against Nautilus GPS's 1.9. Level Tool also leads on update cadence (monthly vs every 21 months) and review sentiment (36% vs 25%). Nautilus GPS's advantage is in-app purchases (none vs 5) and ads (none vs shown). On price, ratings volume and device support there is nothing between them.

Both are free to download. Level Tool sells 5 in-app purchases, starting at $3.99 per 7 days. Nautilus GPS asks for nothing beyond the download.

Level Tool holds the better App Store score, 3.9 against 1.9. Both are backed by a comparable volume of ratings — 12 and 35 respectively. Written reviews point the same way: 25% of Nautilus GPS's written reviews are positive against 36% of Level Tool's.

Nautilus GPS ships an update every 21 months, Level Tool monthly. The most recent releases landed on October 24, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | Nautilus GPS | Level Tool |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.9 (12 ratings)](https://appshunter.io/ios/app/nautilus-gps/id1176272486/reviews) | **[3.9 (35 ratings)](https://appshunter.io/ios/app/level-tool-angle-finder-app/id1672836817/reviews)** |
| Number of ratings | 12 | **35** |
| Positive reviews | 25.0% of reviews | **36.4% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 21 months | **Monthly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 1 MB | 26 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Icarus Aviation Ltd](https://appshunter.io/developer/1176272485) | [Andrei Nemtsou](https://appshunter.io/developer/1612416096) |

## What reviewers say

### Nautilus GPS

[App page](https://appshunter.io/ios/app/nautilus-gps/id1176272486)

This utility app uses your iPhone's camera flash to program a unique MMSI number into a compatible marine rescue GPS device. This allows the device to send Man Overboard and emergency distress signals via AIS and DSC.

**Highlights:** Program MMSI numbers, Utilizes iPhone camera flash, Sends Man Overboard messages, Sends emergency distress signals, AIS and DSC signal transmission, Selectable operating modes (AIS, DSC, both)

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

**In-app purchases:** none


### Level Tool

[App page](https://appshunter.io/ios/app/level-tool-angle-finder-app/id1672836817)

This utility app provides accurate surface measurements using your device's sensors. It offers a virtual level indicator for easy flatness assessment, making it ideal for professionals and DIYers alike. Get precise readings without traditional tools.

**Highlights:** Accurate surface readings, Virtual level indicator, Intuitive interface, Real-time measurements, Gyroscope and accelerometer utilization

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Weekly | $3.99 | per 7 days |
| Welcome One-Time Offer | $4.99 | per month |
| Premium Monthly | $7.99 | per month |
| Premium Annual | $9.99 | per year |
| Premium Annual | $19.99 | per year |


## Frequently asked questions

### Is Nautilus GPS free?

Nautilus GPS is free to download, with no in-app purchases.

### Is Level Tool free?

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

### Which has better reviews, Nautilus GPS or Level Tool?

Level Tool is rated higher. Nautilus GPS averages 1.9 out of 5 from 12 ratings, while Level Tool averages 3.9 from 35 ratings.

### Do Nautilus GPS or Level Tool have ads?

Level Tool shows ads; Nautilus GPS does not.

### Which is updated more often, Nautilus GPS or Level Tool?

Nautilus GPS ships an update every 21 months, and Level Tool monthly. Most recently, Nautilus GPS was updated on October 24, 2026 and Level Tool on October 26, 2026.

---

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