Nautical Ship Flags vs Signal Deck
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Nautical Ship Flags
Explore maritime signal codes and Morse code with interactive quizzes and detailed flag information. Track your learning progress with an analytics view and practice signaling using your phone's flashlight. This app offers full offline functionality for continuous learning.
- Interactive quizzes
- Flag details and reference
- Flashlight Morse signaling
- Progress tracking
- Offline functionality
- Analytics view
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A complete guide to maritime flags, including letters, numbers, substitutes, and Morse code, now with an enhanced Analytics View to track your progress and identify areas for improvement. Enjoy interactive quizzes and detailed flag information. This app also lets you view Morse code signals through your phone’s flashlight, making it perfect for boaters, sailors, and anyone fascinated by maritime navigation. Features: • Interactive Tests • Randomized Question Types • Flashlight Morse Signaling • Flag Details and Symbol Reference • Review and Progress Tracking • Analytics View for tracking your progress • Bright, minimalistic design • Full offline functionality Links for more info: - Terms of Use & Privacy policy: https://nauticalshipflags.com - Link for more info: https://support.apple.com/en-gb/HT202039
Signal Deck
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SignalDeck is the essential training companion for mariners, naval cadets, offshore sailors, and maritime enthusiasts who want to master the International Code of Signals (ICS) flag system — the visual language of the sea. Study the Full ICS Flag Set Browse all 36 ICS flags — the complete 26-letter alphabet (Alpha through Zulu) plus 10 numeral pennants (0 through 9) — presented as beautifully rendered flashcards. Each card shows the flag's name, NATO phonetic pronunciation, and its official maritime meaning. Swipe through at your own pace, filter by letters or numerals, or shuffle the deck to keep every session fresh. Three Drill Modes to Test Your Knowledge Visual ID: A flag appears on screen. Can you name it before time runs out? Tap the correct NATO name from four options and build your streak as the pace intensifies. Flag Bag: The challenge flips — you're given a NATO letter or name and must pick the correct flag from four choices. Perfect for cementing the visual recognition you've built in study mode. Flag IQ: A memory match game with a nautical twist. Flip face-down cards on a grid to pair each flag image with its NATO letter or official ICS meaning. Choose Easy (4×4, letter cards), Medium (4×5, meaning cards), or Hard (6×6, mixed) — and earn your rating from Bridge Apprentice to Master Chief Signalman based on how few mismatches you make. Built for Serious Learners Animated flags rendered with authentic nautical proportions and a sea-breeze waving effect Streak tracking with escalating visual feedback as your streak climbs "Needs Practice" summary after every drill — instantly see which flags to revisit Fleet Readiness Heatmap in your drill log — colour-coded badges show your mastery level for every flag at a glance Drill log that records every session so you can track progress over time Timed pressure in Visual ID and Flag Bag mirrors the urgency of real-world flag communication A Living Reference at Sea and Ashore Whether you're preparing for a maritime exam, brushing up before an offshore passage, training cadets, or simply fascinated by the tradition of visual signaling, SignalDeck gives you a focused, distraction-free environment to drill the flags that matter. Free to Start — Go Premium for Unlimited Access New users get free drill sessions to explore the app. Watch a short ad to unlock another round, or upgrade to Premium for unlimited drills, no ads, and full access to every mode and difficulty tier. The sea doesn't wait. Neither should your training.
Screenshots
Verdict
The clearest difference is ads: Nautical Ship Flags at none against Signal Deck's shown. On price, update cadence, 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. Nautical Ship Flags sells 2 in-app purchases, starting at $0.99 per 7 days and Signal Deck sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
Nautical Ship Flags ships an update every 3 weeks, Signal Deck every 2 weeks. The most recent releases landed on November 4, 2026 and November 5, 2026 respectively.
| Parameter | Nautical Ship Flags | Signal Deck |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (15 ratings) — better | — |
| Positive reviews | 33.3% of reviews | — |
| Number of ratings | 15 — better | — |
| Update frequency | Every 3 weeks | Every 2 weeks — better |
| Ads | No — better | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.2 | 15.1 — better |
| Further details — not scored | ||
| Size | 7 MB | 54 MB |
| Age rating | 4+ | 12+ |
| Developer | Stanislav Cekunov | Ernest Jessop |
In-app purchases
Nautical Ship Flags
- Weekly$0.997 Days
- Lifetime$2.99
Signal Deck
- Signal Deck Pro$0.99
Questions
Is Nautical Ship Flags free?
Is Signal Deck free?
Do Nautical Ship Flags or Signal Deck have ads?
Which is updated more often, Nautical Ship Flags or Signal Deck?
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