Comparison

RAF Aptitude Prep vs London System Chess

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

Head to head
About

RAF Aptitude Prep

Features
Read full description

RAF Aptitude Test Prep helps you train for Defence Aptitude Assessment (DAA) style airman selection drills. Purchase required (subscription or lifetime) via Apple In-App Purchase — there is no free tier. Practice verbal reasoning, numerical reasoning, work rate, spatial reasoning (2D/3D), electrical comprehension, mechanical comprehension, and memory with 2,000+ original timed questions. FEATURES • Timed drills for each DAA-style section • Full mixed mock exams (~148 questions / ~90 min practice target) • Quick practice and practice-by-section • Detailed rationales where helpful • Spaced-repetition review for missed items • Bookmarks and incorrect-answer review • Progress dashboard: readiness %, mastery, streak • Onboarding plan: test date, goal, daily target, reminders • Exam Info and offline-first study SUBSCRIPTION & LIFETIME • Monthly ($4.99) · Yearly ($14.99) · Lifetime ($19.99) • Payment charged to your Apple ID; subscriptions auto-renew unless cancelled at least 24 hours before the period ends • Manage or cancel in App Store account settings • Restore Purchases available on the paywall and in Settings Privacy Policy: https://joykhansayan1.github.io/raf-aptitude-test-prep-legal/privacy.html Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Support: https://joykhansayan1.github.io/raf-aptitude-test-prep-legal/support.html Disclaimer: RAF Aptitude Test Prep is an independent study aid and is not affiliated with, endorsed by, or sponsored by the Royal Air Force or the Ministry of Defence. All practice questions are original.

About

London System Chess

Master a single chess opening for White with interactive lessons and daily reviews. Practice against AI, solve puzzles, and analyze your own games to improve your understanding and retention of the London System.

Highlights
  • Interactive lessons on the London System
  • Spaced repetition for memory retention
  • Sparring against six AI engine levels
  • Daily chess puzzles and timed challenges
  • Analysis of your own game PGNs
  • Progress tracking and rank climbing
Features
Read full description

Out of book by move 5? Tired of learning an opening, then forgetting it by your next game? London System Chess teaches you one solid setup for White that you can play against almost anything: 1…d5, 1…Nf6, the Dutch, the King's Indian and more. Less theory to learn, and more games that start the way you want. HOW IT WORKS 1. Learn: short, interactive lessons where you play every move yourself. Bertie, your bowler-hatted coach, explains why each move works and grades it with the symbols players know: !!, !, !? and ?. 2. Remember: the Commute is a 5-minute daily review that brings each position back right before you'd forget it. It runs on FSRS, a modern spaced-repetition algorithm, so your time goes to the moves you're about to lose. 3. Play: spar against six engine levels, solve daily puzzles, race the clock in Rush Hour and check your real games. THE WHOLE LONDON, FROM FIRST MOVE TO GRANDMASTER IDEAS • 95 lessons in 12 lines: Foundations, Classical, Symmetry and Counterstrike against 1…d5, Trap Street, Fianchetto, the Offbeat Express for the Dutch and other surprises, Endgame Junction, Jobava, Attack, Model Games and the Grandmaster Line. • Every line checked with Stockfish. • Your repertoire as one move tree. Tap any branch to replay it and see what you remember. SEE WHERE YOUR OWN GAMES GO WRONG Game Checkup reads your Chess.com games, or a PGN from anywhere, and shows the exact move where you left the book, next to the London move. Add a slip to your next Commute with one tap, so the same mistake doesn't happen twice. PRACTICE THAT FEELS LIKE PLAY • Rush Hour: 60 seconds. How many London moves can you find? • Mind the Gap: daily puzzles where Black slips up and you punish it. • Sparring Partner: full games against six levels, from Tourist to Grandmaster, with an evaluation bar beside the board. Your opponent plays real London theory. • Climb the ranks from Pawn to Grandmaster, set a daily goal and keep your streak alive. BUILT FOR YOUR LEVEL AND YOUR DAY Brand new or rated 1700, you start with the lessons that fit your level. A lesson takes 3 to 15 minutes, and the daily review about five. No account, no ads, no tracking: your progress stays on your device. START FREE 20 lessons are free: most of the Foundations Line and the first lesson of every other line. So are the daily Commute, the daily puzzle, three Rush Hour runs a day, three sparring levels and Game Checkup. The Season Ticket unlocks all 95 lessons, every puzzle, unlimited Rush Hour, all six engine levels and the premium boards. Choose yearly with a 7-day free trial, monthly, or pay once for lifetime access. Your first London moves take three minutes. All aboard. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

RAF Aptitude Prep4 screens
London System Chess4 screens

Verdict

The call

RAF Aptitude Prep and London System Chess are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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. RAF Aptitude Prep sells 3 in-app purchases, starting at $4.99 per month and London System Chess sells 3 in-app purchases, starting at $7.99 per month. Whichever you choose, the download price is not the number that matters.

ScorecardNo meaningful differences
RAF Aptitude Prep versus London System Chess: the parameters behind the verdict, then further details
ParameterRAF Aptitude PrepLondon System Chess
PriceFreeFree
Rating—5.0 (2 ratings) — better
Number of ratings—2 — better
Update frequency—Every 4 days
AdsNoNo
In-app purchasesYesYes
Monetization—Freemium
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.0 — better18.0
Further details — not scored
Size4 MB13 MB
Age rating4+4+
DeveloperMD Shahariar Nazim JoyBohdan Ivanchenko

In-app purchases

3 purchases

RAF Aptitude Prep

Subscriptions2
  • Monthly$4.991 Month
  • Yearly$14.991 Year
One-time1
  • Lifetime Access$19.99
3 purchases

London System Chess

Subscriptions2
  • Season Ticket (Monthly)$7.991 Month
  • Season Ticket (Yearly)7 Days trial$39.991 Year
One-time1
  • Season Ticket (Lifetime)$89.99

Questions

Is RAF Aptitude Prep free?
RAF Aptitude Prep is free to download, with in-app purchases available.
Is London System Chess free?
London System Chess is free to download, with in-app purchases available.
Do RAF Aptitude Prep or London System Chess have ads?
Neither RAF Aptitude Prep nor London System Chess shows ads.

Other comparisons