Comparison

Q Codes Reference vs OP.TCG

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

Head to head
About

Q Codes Reference

This app helps amateur radio operators learn and recall Q codes, prosigns, and operating abbreviations. It offers a unique search function based on what you need to say, and a trainer with spaced repetition to build proficiency. It also includes band allocations and a Morse code sender.

Highlights
  • Search by intent, not code
  • Spaced repetition trainer
  • Multiple training modes
  • Full contact simulation
  • Signal report builder
  • Band allocations
  • Customizable Morse sender
Features
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Every Q code app on the store indexes by code. Mid-contact you do not have the code. You have the problem. Q Codes Reference is built the other way round. You tell it what you need to say, and it gives you the token that says it. Then it drills that vocabulary until you can recall it under pressure, which is the only kind of knowing that survives a live contact. Rendered through the green phosphor glow of a CRT terminal, and it works with no signal at all. ON AIR Forty situations grouped by intent, each naming the one token that answers it. "Static is spoiling your reception" gives you QRN. "Ask them to wait a moment" gives you AS. Search by what you need to say, not by a code you have not learned yet. A complete worked contact runs end to end, from the first CQ through the callsign exchange and the reports to the closing SK. Every token in it taps through to its full entry. A signal report builder that leads with the definition rather than the digit. Nobody decides to send a five. They decide the other station is perfectly readable, and the five falls out of it. Tap the report to hear it sent as CW, and the cut numbers a contest operator uses are explained underneath. THE TRAINER Spaced repetition with an SM-2 style interval held per item, in three modes. RECOGNISE, the code is shown and you choose its meaning. PRODUCE, the situation is shown and you choose the code. AUDIO, the code is sent as Morse and you choose its meaning. The wrong answers are the point. Distractors come from the codes you actually confuse with this one, so QRZ pulls QRA, QRL and QRS rather than three nobody would mix up. Once both halves of a confusable pair are known they are drilled adjacently, because telling two codes apart is a separate skill from recalling either. The grade comes from your answer and the time you took. You are never asked to mark your own work, because everybody passes that test. Ten questions to a set by default. No streaks, no daily nag. REFERENCE 106 entries across Q codes, prosigns, operating abbreviations and the phonetic alphabet. Every entry carries what it means when you hear it, when it is correct to send it, its question form where it has one, advice per mode, and the codes it is mixed up with. The written Morse sits under the CW line, and a prosign is shown run together as the single character it actually is. AR is not A then R. Search matches the code, the meaning or the situation, so typing "interference" finds QRM without you knowing the code. BANDS Amateur allocations for all three ITU regions, sixteen bands each from 2200 m to 23 cm, grouped LF through UHF. Allocations only. Mode conventions inside a band are the IARU plan, a voluntary agreement, and are not reproduced here. MORSE Every code can be sent as CW at a speed you choose, with Farnsworth spacing so the character speed holds while the gaps stretch. Character gaps, word gaps and run-together prosigns are all timed properly. No rival Q code app sends the code at all. THE CONTENT Every entry was cross-referenced against two independent sources before it shipped. Where the sources disagreed, the derivation settled it. Where something is genuinely unconfirmed, the app says so rather than inventing a figure. FEATURES Forty situations, each with a single correct answer A complete worked contact, start to finish Signal report builder with cut numbers explained Spaced repetition trainer with three drill modes CW audio throughout, at your own character and effective speeds Band allocations for all three ITU regions Green, amber and red phosphor themes Red mode preserves dark adaptation in a night-time shack Progress tracking by family, with the items the scheduler keeps returning Works entirely offline. No account, no network call, no tracking No advertising, no subscriptions, no in-app purchases The allocations shown are for reference and are not an authority to transmit. Always operate to your own licence conditions.

About

OP.TCG

Manage your trading card game collection and build decks with detailed tracking of card versions, prices, and condition. Explore meta decks and analyze your collection's value and progress with smart search and cloud sync.

Highlights
  • Collection tracking
  • Deck building
  • Market price integration
  • Meta deck explorer
  • Collection value analysis
  • Cloud sync
  • Card scanning
Features
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OP.TCG: Track Your OP Card Game Collection & Decks The most complete database for OP TCG collectors and players. Browse over 16,000 references, including cards from every set and sealed products (boosters, decks, displays), in both Japanese and international versions. All in one app. COLLECTION MANAGEMENT Track every card and sealed product in detail: • Versions, condition and grading (PSA, BGS…) • Purchase and sale prices • Quick shop buttons to TCGplayer, Cardmarket and eBay DECK BUILDER & META EXPLORER • Create, save, import and export unlimited decks • See each deck's estimated value and card-by-card price breakdown • Unlock full access to meta decks with OP.TCG PLUS STATISTICS & INSIGHTS Follow the value and progress of your collection: • Total cards by language • Total spent, total sales and profit • Duplicates and graded cards • Total collection value, updated daily SMART SEARCH & FILTERS Find any card in seconds: • Search by name, set, rarity, type, language and more • Save time and stay in full control of your collection CLOUD SYNC Your data is safely backed up with your Apple account. Switch devices without losing anything. OP.TCG PLUS Get the most out of OP.TCG: • Market prices for cards and sealed products • Full collection value, refreshed daily • Unlimited AI-powered card scanner • Unlimited favorite lists • Latest meta decks • Value of decks and complete sets • Advanced filters and upcoming features AFFILIATE DISCLOSURE OP.TCG participates in affiliate programs, including the eBay Partner Network and TCGplayer. Some links in the app or on the website are affiliate links: if you make a purchase through them, OP.TCG may earn a commission at no extra cost to you. TERMS & PRIVACY Terms: https://optcg.app/terms Privacy: https://optcg.app/privacy DISCLAIMER OP.TCG is not an official One Piece application. It is not affiliated with, endorsed or supported by Bandai Co., Ltd.

Screenshots

Q Codes Reference4 screens
OP.TCG4 screens

Verdict

The call

The clearest difference is review sentiment: OP.TCG at 82% against Q Codes Reference's 33%. OP.TCG also leads on price (Free vs $0.99) and rating (4.6 vs 2.3). Q Codes Reference's advantage is in-app purchases (none vs 3). On 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

CostPrice · In-app purchases · Ads · Monetization

OP.TCG is free to download; Q Codes Reference costs $0.99 up front. OP.TCG sells 3 in-app purchases, starting at $4.99 per month. Q Codes Reference asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

OP.TCG holds the better App Store score, 4.6 against 2.3. That said, the two scores are not equally well evidenced: OP.TCG has 160 ratings behind it against 10, so its average is the more settled of the two. Written reviews point the same way: 33% of Q Codes Reference's written reviews are positive against 82% of OP.TCG's.

UpkeepUpdate frequency

Q Codes Reference ships an update every 17 months, OP.TCG every 3 weeks. The most recent releases landed on November 10, 2026 and November 14, 2026 respectively.

Scorecard9 real differences · 1 level
Q Codes Reference versus OP.TCG: the parameters behind the verdict, then further details
ParameterQ Codes ReferenceOP.TCG
Price$0.99Free — better
Rating2.3 (10 ratings)4.6 (160 ratings) — better
Positive reviews33.3% of reviews81.5% of reviews — better
Number of ratings10160 — better
Update frequencyEvery 17 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFreemium — better
DevicesiPhoneiPhone, iPad, iPod — better
Requires iOS17.015.3 — better
Further details — not scored
Size2 MB103 MB
Age rating4+4+
DeveloperStuart WoolleyMikhael Lopez

Customer experience

Q Codes Reference

All ratings10 ratings
Positive30.0%
Neutral0.0%
Negative70.0%
Written reviews6 reviews
Positive33.3%
Neutral0.0%
Negative66.7%

OP.TCG

All ratings159 ratings
Positive89.9%
Neutral3.8%
Negative6.3%
Written reviews65 reviews
Positive81.5%
Neutral9.2%
Negative9.2%

In-app purchases

None

Q Codes Reference

No in-app purchases

3 purchases

OP.TCG

Subscriptions2
  • Monthly contribution3 Days trial$4.991 Month
  • Annually contribution$39.991 Year
One-time1
  • Lifetime contribution$99.99

Questions

Is Q Codes Reference free?
Q Codes Reference costs $0.99, with no in-app purchases.
Is OP.TCG free?
OP.TCG is free to download, with in-app purchases available.
Which has better reviews, Q Codes Reference or OP.TCG?
OP.TCG is rated higher. Q Codes Reference averages 2.3 out of 5 from 10 ratings, while OP.TCG averages 4.6 from 160 ratings.
Do Q Codes Reference or OP.TCG have ads?
Neither Q Codes Reference nor OP.TCG shows ads.
Which is updated more often, Q Codes Reference or OP.TCG?
Q Codes Reference ships an update every 17 months, and OP.TCG every 3 weeks. Most recently, Q Codes Reference was updated on November 10, 2026 and OP.TCG on November 14, 2026.

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