# Clacks — Cup Stacking Race Coach > Cup Stacking Race Coach (iPhone/iPad app by Robert Corbin.) - Source: https://appshunter.io/ios/app/clacks/id6771827316 (this page in markdown: same URL + `.md`) - Developer: [Robert Corbin](https://appshunter.io/developer/1890247992) - Category: Games, Casual - Price: $0.99 (on sale, was $1.99) - Age rating: 4+ - Requires: iOS 17.0 · 37 MB - Languages: American English - Released: 2026-05-26 - Data updated: 2026-08-27 - User reviews in markdown: https://appshunter.io/ios/app/clacks/id6771827316/reviews.md ## What is Clacks? Stack fast. Train smart. Race your best. Clacks is a precision cup-stacking arcade built for quick runs, deep improvement, and same-device competition. Tap cups in the correct order, build each formation, then collapse it cleanly while the clock records every hundredth. RACE COACH Your run history becomes a private performance model. Race Coach measures recent pace, clean-run rate, consistency, trend, and personal best for each pattern. It identifies the skill most likely to help next, sets a reachable target, and builds a four-block practice session. Every calculation stays on your device. SIX WAYS TO PLAY - Quick Stack: choose a pattern and chase a personal best. - Daily Stack: one deterministic challenge that changes each day. - Tournament: progress through six distinct opponents. - Practice: learn the next motion with clear cup guidance. - Local 2-Player: race side by side on one iPhone or iPad. - Endless Marathon: climb an escalating pattern ladder. THREE COMPLETE PATTERNS Master 3-3-3, 3-6-3, and the full Cycle. Each pattern has a purpose-built motion sequence, target tiers, personal-best ghost pacing, and detailed results. BUILT FOR REPLAY - Combo and accuracy scoring. - Personal-best ghosts and split feedback. - Thirty achievements and persistent local progress. - Full run browser, 30-day progress charts, and CSV export. - Cosmetic cup colors earned through play, never purchased. - Procedural clacks, feedback tones, and an adaptive soundtrack synthesized on device. - Haptics, cup labels, larger tap targets, independent audio controls, and Reduce Motion support. - Optimized layouts for iPhone and iPad. ONE COMPLETE PURCHASE No subscriptions. No advertisements. No in-app purchases. No account. No tracking. ## Version history (last 5 releases) ### 2.1 — 2026-08-21 Race Coach turns your completed runs into a focused practice plan without an account or internet connection. It measures clean-run rate, consistency, recent trend, personal best, and readiness, then recommends a target and a four-block session for each pattern. Clacks also has a new precision-arena visual system, a redesigned speed-stacking icon, clearer minimum type sizes, tighter controls, and improved contrast across iPhone and iPad. Reduce Motion now governs SpriteKit cup travel, landing effects, celebration particles, and phase banners in addition to the existing accessibility controls. ### 2.0.1 — 2026-06-24 This update sharpens the interface: the iPad layout now uses a centered, comfortable reading width instead of stretching edge to edge. iPhone is unchanged; still fully on-device. ### 2.0 — 2026-06-21 Clacks 2.0 — a big pro upgrade for the cup-stacking arcade, still 100% offline. • Perfect-tap combo system: nail your timing to build an x1–x8 multiplier; a late tap breaks the chain. • Run scoring + coins: speed, accuracy, and combo combine into a graded score you can spend. • Ghost / PB race: a live "ahead or behind your best" pace pill, with your fastest run auto-saved. • Cup Shop: earn coins to unlock and equip cup skins and table themes. • Difficulty tiers: Relaxed, Standard, Pro, and Lightning, each scaling timing and score. • Endless Marathon: escalating rungs that keep going as long as you can. • A first-launch tutorial plus colorblind labels and larger-tap-target options. No account, no network — every run and unlock stays on your device. ### 1.4 — 2026-06-15 Progress Chart — see how your best time moves day by day. A line chart in Stats and Pro Lab shows your fastest completed run on each of the last 30 days, per pattern. A trend label tells you exactly how many seconds faster (or slower) you have moved over the window — "↓ 1.23s faster over 8 days." A dashed personal-best reference line anchors the chart so you can see how close your daily performance sits to your all-time best. All computed on device from your existing run history. Personal-Best Delta — know immediately if you improved. The result screen now shows a badge below your time: "0.48s faster — new PB!" in green when you beat your record, or "0.35s off PB" in a neutral chip when you fall short. First run on a new pattern shows "First 3-3-3 finish!" instead. No extra taps required — the comparison appears automatically every time you finish. Full Run History Browser — browse all your runs, not just the last 10. A "Full Run History" button in Stats opens a scrollable list of every run ever recorded, with filters for pattern, mode, and finished-only. The previous Stats screen only showed the 10 most recent; now the complete local history is browsable in-app. The CSV export in Pro Lab still works for external spreadsheet analysis. ### 1.3 — 2026-06-14 Clacks 1.3 adds a Pro Stack Lab: a Phase Split Calculator from real per-pattern tap counts, ten WSSA-technique speed drills with a saved checklist, a World Records reference (WSSA 2024 best times), CSV run-history export, and ten new achievements. Fully offline — no account, no ads, no tracking. ## More apps by Robert Corbin - [Daily Word Journey](https://appshunter.io/ios/app/daily-word-journey/id6761548266) - [Hush Secret Text](https://appshunter.io/ios/app/hush-secret-text/id6761658175) - [Renew Guard](https://appshunter.io/ios/app/renew-guard/id6761755447) - [Receipt to PDF](https://appshunter.io/ios/app/receipt-to-pdf/id6761782025) - [Route Your Pay](https://appshunter.io/ios/app/route-your-pay/id6761783719) - [Tip Arbiter](https://appshunter.io/ios/app/tip-arbiter/id6761786879) All apps by Robert Corbin: https://appshunter.io/developer/1890247992 ## Related topics [crimson cup](https://appshunter.io/ios/topics/crimson-cup) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-27.*