Hi abunickabhi, thanks for asking.
Honest answer: not many yet. It's an early beta. So far it's mostly the Venezuelan/LATAM cubing community plus a handful of people I've reached out to, and I'd rather give you that than an inflated number. That's exactly why I'm here: I need people who aren't me to break it.
One correction to my first post: I wrote that everything was free. Almost everything is, but there is an optional Pro tier (details at the end). No ads, ever.
I'm the developer and I'm happy to answer any question, on any topic: how phase detection works, what I log, how verification works in the battles, what's coming, what's missing. Ask away.
Here is the full list of what the app does today (kruxmind.app, also on Google Play as an Android app; ES/EN/PT/DE):
Timer
18 events: 2x2–7x7, 3x3, OH, 3BLD/4BLD/5BLD, MBLD, FMC, Pyraminx, Skewb, Megaminx, Square-1, Clock, FTO
Random-state scrambles, WCA inspection (15 s) with voice warnings at 8 and 12 s, +2/DNF, ao5/ao12/mo3/PB
Input: keyboard/touch, Stackmat by cable, Bluetooth timer, smart cubes (GAN, MoYu, QiYi), manual entry
7 timer fonts, LED display, 4 visual themes, voice, metronome, focus mode
Scramble batches (5/12/25), "train by case" for OLL/PLL, PLL recognition drill (21 cases, 3D cube, your own algorithm per case, synced to your account)
Recon: reconstruct solves, with phase detection from the smart cube move stream
Sessions, failure tags per solve (lockup, pop, twist, misexecution…), suspicious-solve flags, stats, activity heatmap, achievements
Your week, next-ao5 estimate, round simulator, and "your next competition" (enter your WCA ID and it reads the public schedule: round, group, cutoff, countdown)
Customize the cube (shape, finish, colors, logos) in 12 categories; "My cubes" to track your hardware
Import from csTimer, Twisty Timer and CubeDesk; export to JSON or back to csTimer
Optional sync across devices (separate consent), offline mode
Virtual cube
Virtual 3D cube module for NxN and Pyraminx, Skewb, Megaminx, Square-1, FTO (touch, keyboard, gyroscope)
A separate 3x3 virtual-cube timer (KMtimer) with 87+ options (Pro)
Solver
12 categories (3x3, 2x2, 4x4–7x7, Pyraminx, Skewb, Megaminx, FTO, Square-1, Clock): paint your state, step-by-step animated solution, camera scanner (11 categories), batch mode, and a reconstruction of the 2.51 s world record
Learning
Beginner method (two versions, 7 and 8 steps) with a 3D demo and a per-move hint with arrow and signed degrees
Trainers: Cross, F2L (41 cases), OLL (57), PLL (21), COLL (42), advanced F2L, reduced Fridrich (2-look), 2x2 (CLL, EG, Ortega), Megaminx/Pyraminx/Skewb/4x4 trainers
Algorithm library with 11 sets (CMLL, ZBLL, VLS, CLS, WV, SV, EO, ELL, 2GLL, BLE, 2x2)
Lookahead predictor, finger tricks, frame count, memo, patterns, notation, methods (CFOP, Roux, ZZ, Petrus, Mehta, 4x4 reduction)
Dictionary of 662 terms in 4 languages and 6 guides (inspection rules, planning the cross, ao5/ao12, CFOP vs Roux…)
Training plan, session briefings and daily check-in
Daily challenge and elimination
Same scramble for everyone each day in 12 categories, one submission per day, global daily ranking (works with smart cube, Stackmat or BLE timer)
Elimination mode: rounds with a decreasing time threshold
Battles (battle.kruxmind.app)
Online 1v1 and rooms of 2–8, matchmaking or join by code/link/QR
Random-state scrambles, plausibility checks on solves, Elo (starts at 1200, 5 tiers), leaderboard, profile with head-to-head
10 worlds with 120 collectible warriors, progression, public spectator mode, open friendly competitions, in-room chat, rematch and reconnection
Smart cube and Stackmat supported in rooms; local same-device battle also available
Performance analysis
Per-session signals: consistency (CV), single-vs-ao5 gap, DNF rate, fade, smoothness, lookahead, resilience after errors, and a "not conclusive" label when there isn't enough data instead of a made-up number
Performance bank: Tower of London, 15-line spatial judgment test (JLAP-15), simulated 3D rotation, Memory Match, blind-memo trainer, finger speed (TPS)
Guided breathing and attention exercises, pre-solve routine and warm-up
It doesn't measure anything about your brain and makes no health claims; it only analyzes what your turns and times show
Tools without an account
Ao5/Mo3 calculator, TPS calculator, scramble generator, public pages for each topic
Account
Email account (16+), guest mode, data export, account deletion. Pro purchase through the web (kruxmind.com/pro) and Google Play.
What's Pro (optional, no ads): Timer Engine and Analysis tabs, cumulative analysis and training plan, some performance-bank tests, full history beyond 7 days in stats/heatmap, KMtimer, and unlocking cube customization beyond 3x3 without progressing through the battle worlds. Everything else above is free.
What it doesn't do yet: smart cubes on iOS (Safari has no Web Bluetooth), GiiKER/GoCube aren't hardware-verified so I don't promise them, stats depth isn't at csTimer's level, and the coach feature is switched off.
If you try it, the three things that help most: which phase splits look wrong on your solves (scramble + your reconstruction), your exact cube model and whether it connected, and one thing you'd need before using it as your main timer. I'll post fixes here as they ship. Thanks!
Fredd
