dob vs ChessClues
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
dob
This app offers exercises to train essential visual skills like attention, coordination, and memory. It's designed for learners of all ages, including children and individuals undergoing rehabilitation, and can be customized to individual needs.
- Visual Attention training
- Ocular motility exercises
- Hand and Eye Coordination
- Motion Perception
- Contrast Sensitivity
- Face and facial expression recognition
- Color Recognition and differentiation
- Figure-Ground Perception
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Visual perception training Basic version for learners containing a set of 10 fixed exercises, covering the most important visual skills. Additionally there is an import area for 10 more exercises where you are able to import more exercises from dob pro - the full version for teachers and therapists. Supported languages: English, Spanish, Portuguese, German, French, Italian With the assistance of dob the learners are stimulated and supported in the following areas: Visual Attention Ocular motility Hand and Eye Coordination Motion Perception Contrast Sensitivity Face recognition and facial expression recognition Color Recognition and differentiation Figure-Ground Perception Object recognition and differentiation Visual Memory Search Strategies dob pro the full version for therapists, coaches and teachers, containing more than 2500 exercises for the training and observation of 11 basic visual skills Change size of objects or tracks with gestures, modify opacity and background. This is how to adapt the exercises to the individual needs of the learners. dob offers exercises both for adults and for children of any age. The training is suited specifically for the following area of application: Curative education - People with developmental delays, visual impairment or multiple disabilities Early childhood education - All children aged 2 to 6 years Physical rehabilitation - For example, after stroke Psychomotricity, occupational therapy and speech therapy User guide, object list, track list, video tutorials, subscription to newsletter » www.dob.li
ChessClues
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Every opening has its own tactics. In the Italian, royal forks turn up four times more often than in chess as a whole. In the Caro-Kann, it is Boden's mate. ChessClues shows you the tactics, patterns and mates that happen in the openings you play, and teaches you how to win with them. Tactics trainers teach patterns in isolation. Opening trainers teach moves. ChessClues connects the two: pick your openings, and see which patterns turn up in them more often than in chess as a whole, ranked from real club games. SEE THE TACTICS IN EVERY OPENING • The Pattern Atlas for each opening: its signature tactics, ranked by how often they appear there. • Each pattern explained in plain words: what to look for, and why it works. • The typical pawn structures of the opening, with a plan for each. • The main named lines, and the traps club players fall into, move by move. LEARN TO WIN IN YOUR OPENING • A learning path for each opening: a pattern tour, its traps, its top tactics from easiest to hardest, then a final test. • 36 interactive courses, 216 short lessons where you play the moves: one course per opening, plus checkmates, tactics by name, finishing the game, and pawn and rook endgames. • Your teacher, Finn or Nia, talks you through every lesson. THE MATES THAT HAPPEN IN YOUR OPENING Smothered mate, back-rank mate, Légal's mate, Boden's mate and dozens more, each shown in the openings where it really happens. PRACTISE ON REAL POSITIONS More than 140,000 puzzles from real games in your openings, at three levels: • Spot: one move wins it. • Set-up: one forcing move first, then the payoff. • Deep: three moves and beyond. Spaced review brings back the patterns you are still missing. Recognise trains your eye: ten real positions, five seconds each. 13 OPENINGS As White: Italian, Ruy Lopez, Scotch, Vienna, Bishop's Opening, Four Knights, Queen's Pawn Game (London setup). As Black: Sicilian, French, Caro-Kann, Scandinavian, Philidor, Queen's Gambit Declined. EVERY DAY • A daily drill of 5 puzzles from your openings. Free. • Trap of the day and pattern of the day. • A blind-spot grid: your openings against their top patterns, by mastery. • Across your openings: the patterns they share, to learn first. • Search a pattern by name (smothered mate, royal fork) and see which openings produce it. • Tactics tree and Endgame Atlas: the same patterns under their textbook names, and the endgames each opening tends to reach. MADE FOR 800–1600 PLAYERS Choose your openings and rating; change them any time in Settings. OFFLINE, NO ACCOUNT Everything ships inside the app and works offline. No sign-in, no ads, no analytics. Progress stays on your device. The app goes online only for purchases. Two-pane layout on iPad and Mac. FREE AND ALL ACCESS Free, the same for everyone: the daily drill; 100 Spot and Set-up puzzles in every opening; 10 in every pattern and mate; the top three patterns of every opening in the Atlas; five traps in every opening; the first two lessons of every course. All Access opens every level including Deep, every trap, all 216 lessons, the full Atlas, and everything added while you have access. Choose a yearly subscription or a one-time lifetime unlock; the store shows the price before you buy. Restore purchases and manage your subscription in Settings. All Access yearly renews automatically at the end of each year unless cancelled at least 24 hours before the period ends; payment is charged to your Apple ID and you can manage or cancel it in Account Settings. Terms of Use: https://happyheadsapps.netlify.app/chessclues/terms. Privacy Policy: https://happyheadsapps.netlify.app/chessclues/privacy.
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Verdict
The clearest difference is price: ChessClues at Free against dob's $2.99. ChessClues also leads on device support (3 vs 1). dob's advantage is iOS requirement (12.0 vs 15.0). On ads and in-app purchases 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
ChessClues is free to download; dob costs $2.99 up front. dob sells 1 one-off in-app purchase and ChessClues sells 2 in-app purchases, starting at $14.99 per year. Whichever you choose, the download price is not the number that matters.
| Parameter | dob | ChessClues |
|---|---|---|
| Price | $2.99 | Free — better |
| Rating | 1.0 (1 ratings) — better | — |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 3 months | — |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Paid | — |
| Devices | iPad | iPhone, iPad, iPod — better |
| Requires iOS | 12.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 78 MB | 58 MB |
| Age rating | 4+ | 4+ |
| Developer | Rene Fehr-Biscioni | Santosh Hegde |
In-app purchases
dob
- All exercises$11.99
ChessClues
- All Access — 1 Year$14.991 Year
- All Access — Lifetime$24.99









