Comparison

NavCalc Dynamic vs BookletMaker

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • 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
Features
Read full description

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.

About

BookletMaker

Features
Read full description

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

NavCalc Dynamic1 screens
BookletMaker4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

NavCalc Dynamic ships an update every 6 days, BookletMaker monthly. The most recent releases landed on November 3, 2026 and October 29, 2026 respectively.

Scorecard2 real differences · 7 level
NavCalc Dynamic versus BookletMaker: the parameters behind the verdict, then further details
ParameterNavCalc DynamicBookletMaker
PriceFreeFree
Rating5.0 (2 ratings) — better—
Number of ratings2 — better—
Update frequencyEvery 6 days — betterMonthly
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPodiPhone, iPad, Mac
Requires iOS13.0 — better17.0
Further details — not scored
Size15 MB6 MB
Age rating4+4+
DeveloperRichard CraddockQingdao Yueyi Network Technology Co., Ltd.

In-app purchases

None

NavCalc Dynamic

No in-app purchases

None

BookletMaker

No in-app purchases

Questions

Is NavCalc Dynamic free?
NavCalc Dynamic is free to download, with no in-app purchases.
Is BookletMaker free?
BookletMaker is free to download, with no in-app purchases.
Do NavCalc Dynamic or BookletMaker have ads?
Neither NavCalc Dynamic nor BookletMaker shows ads.
Which is updated more often, NavCalc Dynamic or BookletMaker?
NavCalc Dynamic ships an update every 6 days, and BookletMaker monthly. Most recently, NavCalc Dynamic was updated on November 3, 2026 and BookletMaker on October 29, 2026.

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