BLD Coach
Your Blindfolded Cubing Training Coach
The most advanced training app for blindfolded speedcubers. Separate memo and execution timing. Statistics that treat DNFs as data rather than gaps. An algorithm reference for Old Pochmann, M2 and 3-Style, searchable while you’re still holding the cube. Named training sessions with their own averages and goals.
A cube timer measures one number. Blindfolded solving has two.
Every general speedcubing timer records a single time per solve. That number cannot tell you whether an attempt was slow because the memorisation was slow or because the execution was. For a BLD solver, that is the only question that matters.
An ordinary cube timer
- One time per solve
- No idea whether memo or execution was slow
- DNF is a missing row in the data
- Averages assume every attempt succeeds
- Algorithms live in a browser tab or a PDF
- Sessions are a flat list of times
BLD Coach
- Memo, execution and total, recorded separately
- Your bottleneck is a number, not a guess
- Success and DNF rates are core statistics
- Averages alongside success rate, so both are honest
- Old Pochmann, M2 and 3-Style, searchable in the app
- Named sessions with independent statistics and goals
Built by a world-class BLD solver
BLD Coach exists because the tools didn’t. After years of competitive blindfolded solving, the daily practice routine still meant a general-purpose cube timer that recorded one number, a spreadsheet to work out whether memo or execution was the problem, and a browser tab of commutators alongside both.
This app is that routine, built properly. Its author holds a Guinness World Record in blindfolded speedcubing — 48 of 48 cubes solved — and every decision in it comes from needing the answer mid-practice rather than from a feature list.
Cubes solved blindfolded — a Guinness World Record
Methods supported: Old Pochmann, M2 and 3-Style
Rolling averages from Ao5 all the way up
Accounts required — everything is on your device
Separate memo and execution timing
A BLD solve is two different skills wearing one time. Memorising a scramble and executing it blind fail for different reasons and improve at different rates. BLD Coach times them separately, so you can see which half is actually holding you back.
- Tap to start memo, tap again to begin execution, tap to stop
- Every solve stores memo, execution and total independently
- Live Mo3 and Ao5 while you are still solving
- Success, +2 and DNF logged per attempt
- WCA-standard 20-move scramble generator
- Manual entry and editing for solves done away from the app
Statistics built for blindfolded solving
Averages that assume every attempt succeeds are close to useless in BLD, where a DNF is a normal outcome rather than a disaster. BLD Coach tracks success and DNF as first-class numbers, and trends memo against execution so progress is visible over weeks.
- Rolling Ao5, Ao12, Ao25, Ao50 and Ao100
- Best-ever Mo3, Ao5, Ao12, Ao25 and Ao100
- Success rate and DNF rate
- Personal bests for single, memo and execution
- Memo, execution and total trend charts
- Time-of-solve distribution histogram
Practice in named sessions
Learning M2 and drilling 3-Style for a competition are different projects, and averaging them together hides both. Sessions keep each one separate, with their own statistics and optional targets.
- Named sessions with their own independent statistics
- Per-session icon and colour
- Optional training goals: solve count, success count, success rate
- Target memo and total times, practice duration, completion date
- Switch sessions from the timer without losing context
- Move solves between sessions in bulk
The commutator you need, mid-practice
Reference sheets for the three methods people actually use, searchable while you are still holding the cube — plus room for the algorithms you have worked out yourself.
- Old Pochmann, M2 and 3-Style commutators
- Filter by method, piece type and difficulty
- Search names, targets, notation and tags
- Add your own algorithms alongside the built-in library
- Favourite the ones you are drilling
- Personal notes on any entry
Every solve, searchable
A practice log is only useful if you can interrogate it. Filter down to the attempts you care about — every DNF on M2 last week — and correct anything you mis-logged.
- Full log with memo, execution, total and method per solve
- Search including scramble text
- Filter by result and method, sort by date
- Edit, duplicate or delete any solve
- Bulk delete and bulk move between sessions
Import, export, and a real backup
Your practice history is yours. It lives on your device, and you can take it out in a portable format at any time — no account required, nothing to sign into.
- Export to JSON or CSV
- Import from JSON
- Full database backup and restore
- Stored locally on the device in SQLite
- No account, no sign-in, no cloud dependency
Legible at a competition, legible at 1am
A real light theme and a real dark theme — both designed for the app rather than generated by inverting colours. Timer digits stay high-contrast in either.
Planned, and honestly labelled
None of the following is in the app today. They are the next things worth building, listed so you can judge whether BLD Coach is heading where you need it to.
- Coming soon
Algorithm trainer
Spaced-repetition drilling for commutators, so the library becomes practice rather than reference.
- Coming soon
AI Coach
Personalised practice recommendations derived from your own solve history — where your time is going, and what to drill next. AI is an addition to the app, not what the app is.
- Not yet available
Cloud sync
Solves, sessions and algorithms synchronised across devices. The data model was designed for this from the start.
- Not yet available
Memo palace builder
A tool for planning and reusing memory palace routes and letter schemes.
- Not yet available
MBLD
Multi-blind as a distinct solving mode, with its own scramble, timing and scoring model.
- Not yet available
Additional themes
More colour themes beyond the current Light and Dark, and a wider session icon picker.
Frequently asked
- What is blindfolded speedcubing?
- You inspect a scrambled cube, memorise its state, then put on a blindfold and solve it without looking. The attempt is timed from first inspection to final turn, and it either succeeds or is a DNF — there is no partial credit. Solvers use letter or image schemes to memorise piece positions, then apply algorithms to swap pieces in a fixed order.
- Who is BLD Coach for?
- Cubers learning blindfolded solving for the first time with Old Pochmann or M2, intermediate and advanced solvers using 3-Style who want to see their memo and execution split, and competitors preparing for WCA events who need session statistics.
- How is this different from a normal cube timer?
- General speedcubing timers record one time per solve. That single number cannot tell you whether a slow attempt was slow memo or slow execution, and most timers treat a DNF as a gap in the data rather than a meaningful result. BLD Coach records memo, execution and total separately, and treats success and DNF rates as core statistics.
- Does it support Old Pochmann?
- Yes. Old Pochmann is one of the three built-in methods, with its own algorithm reference, and it can be set per solve and per session.
- Does it support M2?
- Yes. M2 is fully supported as a method, including its algorithm reference sheet and parity cases.
- Does it support 3-Style?
- Yes. 3-Style commutators for corners and edges are included, filterable by piece type and difficulty, and you can add your own commutators to the library.
- Can I import and export my data?
- Yes. You can export to JSON or CSV, import from JSON, and take a full database backup that can be restored later. There is no lock-in.
- Does it work offline?
- Yes. Everything runs on the device against a local database. There is no account and no network requirement for timing, statistics or the algorithm library.
- Is the app available yet?
- Not publicly. BLD Coach is in closed testing while the feature set settles. Request early access and we will contact you when a build is available for your platform.
- Will it be on Android and iOS?
- Both are planned. The app is built in Flutter from a single codebase, so Android and iOS releases are intended. Public availability will be announced once testing is complete.
- What is coming next?
- An algorithm trainer for spaced-repetition drilling, an AI Coach that recommends practice based on your own history, cloud sync across devices, a memo palace builder, MBLD support and additional themes. None of these are available today.
- How much will it cost?
- Pricing has not been decided. The current thinking is a free tier covering the timer, scramble generator and core statistics, with a paid unlock for the deeper training features — but nothing is fixed, and early testers will hear before anything changes.
Request early access
BLD Coach is in closed testing while the feature set settles. Tell us which method you solve and which platform you use, and we’ll be in touch when there’s a build for you.
Or write to bldcoach@embarc.co.in