Comparison

Digital Battenberg vs Image to PDF ·

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

Head to head
About

Digital Battenberg

This specialized marine navigation tool assists bridge officers and naval professionals in solving complex relative motion problems. It offers a high-fidelity tactical plot for station keeping and maneuvers, replacing manual plotting with a fast, error-free calculator.

Highlights
  • Relative motion solver
  • PPI radar-style display
  • Stationing from ahead module
  • Flying course and wind calculator
  • Customizable vessel profiles
  • Offline calculations
Features
Read full description

Digital Battenberg is a specialised marine navigation tool designed for bridge officers and naval professionals to solve complex relative motion problems with speed and precision. Built on standard naval methodologies (BR 45), this app provides a high-fidelity tactical plot for station keeping and changing station during OOW maneuvers. KEY FEATURES: - Relative Motion Solver: Calculate Course to Steer (CTS), Speed of Relative Motion (SRM), and time to station. - PPI Display: Visualize maneuvers on a dynamic radar-style plot with own-ship centered perspective. - Stationing from Ahead: Specialized module for joining from ahead maneuvers including wheel-over point (Point G) and Parallel Index (PI) calculations. - Flying Course and True Wind Calculator - Maneuver Data Interpolation: Fully customizable vessel profiles. Input your ship’s data (Advance, Transfer, Deceleration) to get precise execution checkpoints. - Maneuvring Board - Offline Ready: No internet connection required for calculations Whether you are changing station or conducting a complex approach, Digital Battenberg replaces manual plotting with a fast, error-free calculator.

About

Image to PDF ·

Features
Read full description

Convert anything to PDF in one tap — and keep it on your phone. Image to PDF ‧ PDF Converter turns photos, scans, Word documents, Excel sheets and PowerPoint slides into clean, shareable PDFs in seconds. No account. No upload. No watermark. WHAT YOU CAN DO - Photos & images to PDF — JPG, PNG, HEIC, multi-page - Word, Excel and PowerPoint to PDF, formatting preserved - Scan paper documents with your camera, with edge detection - Merge several PDFs into one file - Compress a PDF to email or upload it - Sign documents with your finger - Extract text from any scan with on-device OCR - Reorder, rotate and delete pages PRIVATE BY DESIGN Every conversion runs on your iPhone using Apple's own frameworks. Your documents are never uploaded to a server, never stored in the cloud and never seen by anyone but you. Works fully offline — on a plane, on the subway, anywhere. BUILT FOR EVERYONE Full VoiceOver support and Dynamic Type throughout. Works with the iOS Share Sheet, the Files app and Shortcuts, so you can convert without opening the app at all. App offers premium features through auto-renewable subscriptions. Payment will be charged to your Apple ID account upon confirmation of purchase. Subscriptions automatically renew unless canceled at least 24 hours before the end of the current period. You can manage your subscription and turn off auto-renewal in your account settings. For more details on managing subscriptions, visit: support.apple.com/en-us/HT202039 Privacy Policy: https://sites.google.com/view/thepdfconverter/privacy-policy Terms of Use: https://sites.google.com/view/thepdfconverter/terms-of-use

Screenshots

Digital Battenberg4 screens
Image to PDF ·4 screens

Verdict

The call

The clearest difference is in-app purchases: Digital Battenberg at none against Image to PDF ·'s 2. Digital Battenberg also leads on device support (3 vs 1) and iOS requirement (15.0 vs 17.0). On update cadence and ads 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

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly fortnightly. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.

Scorecard3 real differences · 7 level
Digital Battenberg versus Image to PDF ·: the parameters behind the verdict, then further details
ParameterDigital BattenbergImage to PDF ·
Price—Free — better
Rating5.0 (2 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings2 — better—
Update frequencyFortnightlyFortnightly
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaid—
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.0 — better17.0
Further details — not scored
Size4 MB10 MB
Age rating4+4+
DeveloperSwaminathan .Kiran Gajjar

In-app purchases

None

Digital Battenberg

No in-app purchases

2 purchases

Image to PDF ·

Subscriptions2
  • Image to PDF Converter Pro$4.997 Days
  • PDF Converter Pro - Photo to PDF7 Days trial$29.991 Year

Questions

Is Digital Battenberg free?
Pricing for Digital Battenberg is not currently listed on the App Store.
Is Image to PDF · free?
Image to PDF · is free to download, with in-app purchases available.
Do Digital Battenberg or Image to PDF · have ads?
Neither Digital Battenberg nor Image to PDF · shows ads.
Which is updated more often, Digital Battenberg or Image to PDF ·?
Digital Battenberg ships an update fortnightly, and Image to PDF · fortnightly. Most recently, Digital Battenberg was updated on November 5, 2026 and Image to PDF · on October 31, 2026.

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