NavCalc Dynamic vs BookletMaker
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
NavCalc Dynamic
This app calculates the course and speed needed to counteract current and wind effects for navigation. It visually displays these calculations on a compass rose, dynamically updating as parameters change. Useful for learning and solving real-world sailing problems.
- Calculate Course to Steer (CtS)
- Calculate Speed over Ground (SoG)
- Visual compass rose display
- Dynamic parameter updates
- Magnetic variation input
- Leeway and wind direction input
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NavCalc is a simple navigation calculator. Given a desired heading, boat speed, and the set and drift of current, NavCalc will display the Course to Steer (CtS) and Speed over Ground (SoG) that will be achieved on that course given the current. NavCalc draws a neat little picture of the heading, current vector, and course to steer on a 360º compass rose which includes both degrees True and Magnetic (if you enter a Magnetic Variation). NavCalc also allows you to enter degrees of leeway and wind direction, and will take leeway into account when calculating the CtS. NavCalc will dynamically update the drawing as you change any of the parameters (heading, boat speed, current set or drift, variation). NavCalc can be used to solve navigation problems like the ones you might find on the tests for Coastal Navigation courses from US Sailing or ASA. It’s also useful for building intuition about how current affects your boat’s course and speed over ground (or velocity made good) since it updates dynamically as you change any parameter.
BookletMaker
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BookletMaker turns any PDF into a printable booklet in seconds. Import your file, and the app automatically calculates the optimal page imposition order for duplex printing. Print, fold the sheets in half, and you have a professional-looking booklet ready for binding. Features: • One-click PDF to booklet conversion • Smart auto-imposition for correct page sequencing • Live preview before printing • Support for A4 and US Letter paper sizes • Split PDFs into individual pages or merge multiple PDFs • Built for iPhone and iPad — handle PDFs anywhere Need handouts, manuals, or custom booklets? BookletMaker makes it effortless.
Screenshots
Verdict
The clearest difference is update cadence: NavCalc Dynamic at every 6 days against BookletMaker's monthly. NavCalc Dynamic also leads on iOS requirement (13.0 vs 17.0). On price, ads, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
NavCalc Dynamic ships an update every 6 days, BookletMaker monthly. The most recent releases landed on November 3, 2026 and October 29, 2026 respectively.
| Parameter | NavCalc Dynamic | BookletMaker |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) — better | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 6 days — better | Monthly |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Requires iOS | 13.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 15 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | Richard Craddock | Qingdao Yueyi Network Technology Co., Ltd. |
In-app purchases
NavCalc Dynamic
No in-app purchases
BookletMaker
No in-app purchases
Questions
Is NavCalc Dynamic free?
Is BookletMaker free?
Do NavCalc Dynamic or BookletMaker have ads?
Which is updated more often, NavCalc Dynamic or BookletMaker?
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