Nautilus GPS vs Level Tool
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Nautilus GPS
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.
- 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)
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The Nautilus GPS App uses your iPhones camera flash to set an MMSI number into your Nautilus Marine Rescue GPS. This enables your Nautilus GPS to send Man Overboard messages to your dive boat for up to 30 minutes in addition to sending an emergency distress signal on AIS. You can also choose the operating mode of the Marine Rescue GPS to use either AIS (Automatic Identification System), DSC (Digital Selective Calling), or both AIS and DSC. Note that no MMSI Number is required to operate the Marine Rescue GPS.
Level Tool
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.
- Accurate surface readings
- Virtual level indicator
- Intuitive interface
- Real-time measurements
- Gyroscope and accelerometer utilization
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Level Tool app is designed to provide you with accurate readings of any surface by utilizing your device's built-in gyroscope and accelerometer. With Level Tool, you no longer need to rely on traditional bubble levels or bulky measuring tools. The app displays a virtual level indicator on your screen, and all you need to do is place your device on the surface you want to measure. The indicator will show you how flat or uneven the surface is by giving you real-time measurements. The Level Tool app is incredibly easy to use, and its intuitive interface ensures that you get accurate readings every time. Whether you're a professional builder, DIY enthusiast, or just need to measure the flatness of a surface for any reason, this app is an essential tool for your toolkit. Terms of use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula
Screenshots
Verdict
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.
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. 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.
| Parameter | Nautilus GPS | Level Tool |
|---|---|---|
| Price | Free | Free |
| Rating | 1.9 (12 ratings) | 3.9 (35 ratings) — better |
| Positive reviews | 25.0% of reviews | 36.4% of reviews — better |
| Number of ratings | 12 | 35 — better |
| Update frequency | Every 21 months | Monthly — better |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 15.6 | 13.0 — better |
| Further details — not scored | ||
| Size | 1 MB | 26 MB |
| Age rating | 4+ | 4+ |
| Developer | Icarus Aviation Ltd | Andrei Nemtsou |
Customer experience
Nautilus GPS
Level Tool
In-app purchases
Nautilus GPS
No in-app purchases
Level Tool
- Premium Weekly$3.997 Days
- Welcome One-Time Offer$4.991 Month
- Premium Monthly$7.991 Month
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- Premium Annual$9.991 Year
- Premium Annual$19.991 Year
Questions
Is Nautilus GPS free?
Is Level Tool free?
Which has better reviews, Nautilus GPS or Level Tool?
Do Nautilus GPS or Level Tool have ads?
Which is updated more often, Nautilus GPS or Level Tool?
Other comparisons
