Boating Calcs vs BilgeBuddy
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Boating Calcs
This app offers over 120 boating calculations and unit conversions, along with 120 reference pages. Easily solve a variety of boating-related problems, save and share your calculations, and quickly find the tools you need. It includes extensive reference material across various boating disciplines.
- Over 120 boating calculations
- Extensive unit conversions
- 120+ reference pages
- Save and open calculations
- Add calculators to favorites
- Email calculation inputs and results
- Search functionality
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You asked for more calculators and we've added them. Boating Calcs has over 120 boating calculations and unit conversions and 120 reference pages. With Boating Calcs you can quickly and easily solve a variety of boating calculations from your iPhone or iPad. Not just calculators, but the ability save and open saved calculations and add calculators to a favorites list. You can also email calculator inputs and results so you can easily share your calculations. Search functionality enables you to quickly find the calculator you want. Chapters: * Area, Angles & Volume * Communications References * Unit Conversions * Finance Calculations * Fuel Calculations * Glossary / Acronyms * Line Calculations and References * Knot References * Mechanical & Electrical Calculations * Performance Calculations * Piloting Calculations * Propeller Reference and Calculations * Weather & Waves Reference and Calculations If there's a calculator or reference material you'd like to see added, visit our website and send us an email.
BilgeBuddy
This app allows you to remotely monitor your boat's bilge system, battery health, and location. Receive instant notifications for potential issues like flooding, system malfunctions, or unexpected movement, ensuring peace of mind and proactive problem-solving.
- Remote bilge system monitoring
- Flooding detection and sinking prevention
- Battery system health monitoring
- Break-away alerts and location services
- Impact detection
- Easy installation with common pumps
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Remotely Monitor Your Boat - Connect your boat with the BilgeBuddy device, making it a smart boat that can be monitored remotely on the app. - Have peace-of-mind in the palm of your hand, where ever you are. - Notifications let you fix problems before they arise. Easy Installation - BilgeBuddy pairs with all common 12V bilge pumps & floats. - Our patent pending technology allows for an easy installation with a few simple connections. - Our instructions get most DIYers & all professionals up and running in minutes. All you need are wire strippers and a lighter. We provide the rest. How BilgeBuddy keeps your boat safe: Flooding Detection & Sinking Prevention - Detect moderate & extreme water levels. - Automatically purge high water when auto-float fails. - Analyze frequency & reason for bilge cycles. Bilge System Health Monitoring - Ensure functioning bilge pump. - Proactive pump electronic health monitoring. - Detect Auto-float malfunction. - Alert of helm switch accidentally left on. Battery System Health Monitoring - Remotely check if enough voltage to start engines. - Battery discharge & charging trends. - Detect alternator & shore power system malfunction. Break-away Alerts & Location Services - Alert when your boat leaves its home base unexpectedly. - Remotely monitor when others use your boat. - Cloud backup of trips and usage. - Back-up navigation system. Impact Detection & Damage Prevention - Detect impacts with dock. - Detect major collisions. Freeze Damage Prevention & Storm Monitoring - Prevent damage during quick freezes. - Storm warnings & monitoring. (coming soon)
Screenshots
Verdict
The clearest difference is price: BilgeBuddy at Free against Boating Calcs's $1.99. BilgeBuddy also leads on update cadence (every 6 weeks vs every 7 months) and review sentiment (100% vs 81%). Boating Calcs's advantage is iOS requirement (9.0 vs 13.0). On rating, ratings volume, ads and in-app purchases 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
BilgeBuddy is free to download; Boating Calcs costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
On the App Store both sit at effectively the same score — 4.8 for Boating Calcs against 4.9 for BilgeBuddy. Both are backed by a comparable volume of ratings — 27 and 14 respectively. Written reviews are what separate them: 81% of Boating Calcs's written reviews are positive against 100% of BilgeBuddy's.
Boating Calcs ships an update every 7 months, BilgeBuddy every 6 weeks. The most recent releases landed on October 21, 2026 and October 6, 2026 respectively.
| Parameter | Boating Calcs | BilgeBuddy |
|---|---|---|
| Price | $1.99 | Free — better |
| Rating | 4.8 (27 ratings) | 4.9 (14 ratings) — better |
| Positive reviews | 81.3% of reviews | 100.0% of reviews — better |
| Number of ratings | 27 — better | 14 |
| Update frequency | Every 7 months | Every 6 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 9.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 17 MB | 36 MB |
| Age rating | 4+ | 4+ |
| Developer | Calculated Industries | BilgeBuddy |
Customer experience
Boating Calcs
BilgeBuddy
In-app purchases
Boating Calcs
No in-app purchases
BilgeBuddy
No in-app purchases









