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4.6 out of 5 from 156 submitted ratings. 31,144+ groupings generated. Completed solves counted since April 2026.

Free account

FreeNo subscription

3 advanced generations / day¹

Unlimited standard grouping
All rules & solver modes
Local saving & exports
Snapshot sharing

No cloud sync or hosting

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Pro

€6.99/ month

Tax included · Renews monthly

€6.99 base price. Checking your local currency…

Unlimited advanced grouping

Everything in Free
Sync across your devices
Invite viewers & editors
Cloud access controls
Pro API: 300 compute seconds / day

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Open a category to see what’s included.

Feature	No account	Free account	Pro
Standard groupingGroup any number of people in a single round, and generate multi-round schedules for up to 50 people without advanced scenario features.	Unlimited	Unlimited	Unlimited
Advanced generationGenerating a multi-round schedule with more than 50 active people, people attending only some rounds, or group-size limits that change between rounds. Multiple rounds and grouping rules alone do not make a generation advanced.	Not included	3 per day¹	Unlimited
Over 50 people, multi-round²Generate multi-round schedules for more than 50 people. Single-round groupings are free at any size. Shares the free account allowance of 3 schedule generations per day; unlimited with Pro.	Not included	Included with daily limits, see note 2	Included
Partial attendance²Generate schedules where people attend only some rounds. Shares the free account allowance of 3 schedule generations per day; unlimited with Pro.	Not included	Included with daily limits, see note 2	Included
Variable group capacities²Generate schedules with group-size limits that change between rounds. Shares the free account allowance of 3 schedule generations per day; unlimited with Pro.	Not included	Included with daily limits, see note 2	Included
Variable group minimums²Generate schedules with minimum group sizes that change between rounds. Shares the free account allowance of 3 schedule generations per day; unlimited with Pro.	Not included	Included with daily limits, see note 2	Included
Access after limitsKeep editing, viewing and exporting after the daily limit. The allowance limits generation with advanced features, not access to your work.	Included	Included	Included

Feature	No account	Free account	Pro
Setup editorsQuick Setup & full Scenario Editor.	Included	Included	Included
Multiple roundsMulti-round grouping & custom round names.	Included	Included	Included
Group names & sizesNamed groups with individual sizes and minimum occupancy.	Included	Included	Included
Automatic group setupScaffold groups by group count or people per group.	Included	Included	Included
Custom participant attributesDefine categorical and numeric values for grouping and presentation.	Included	Included	Included
Participant importsImport names, spreadsheet CSV & Zoom breakout CSV.	Included	Included	Included
Setup viewsCards, list & editable CSV views for setup.	Included	Included	Included
Attendance & size editingModel attendance and group-size changes. Editing is available to everyone; generating with these advanced features uses the allowance above.	Included	Included	Included
Reusable scenariosExample scenarios & reusable local scenarios.	Included	Included	Included

Feature	No account	Free account	Pro
Fixed PlacementsAssign selected people to a specific group.	Included	Included	Included
Keep TogetherRequire selected people to share a group.	Included	Included	Included
Keep ApartRequire selected pairs to be in different groups.	Included	Included	Included

Feature	No account	Free account	Pro
Prefer TogetherFavor selected pairs meeting, with a configurable weight.	Included	Included	Included
Prefer ApartFavor selected pairs being separated, with a configurable weight.	Included	Included	Included
Balance AttributesDistribute attributes using exact or at-least targets.	Included	Included	Included
Attribute TotalsTarget numeric totals per group: exact, minimum, maximum, or a range.	Included	Included	Included
EncountersSet minimum or maximum rounds in which selected people meet together.	Included	Included	Included
Group VisitsTarget how often people visit each group or a set of groups.	Included	Included	Included
Automatic attribute distributionRecalculate balance targets as people, attendance, groups, and rounds change.	Included	Included	Included
Rule scopeScope rules to selected people, groups & rounds.	Included	Included	Included
Weights & penaltiesCustom weights & linear or squared penalties. Where supported by the selected preference or objective.	Included	Included	Included

Feature	No account	Free account	Pro
Maximize ContactsReward distinct pairs meeting at least once.	Included	Included	Included
Avoid RepeatsMinimize repeated pair meetings above your chosen threshold.	Included	Included	Included
Combine goalsCombine goals & adjust their relative weights.	Included	Included	Included

Feature	No account	Free account	Pro
Recommended generationAutomatic recommended generation.	Included	Included	Included
All solver modesAuto, Extreme & Ultra Extreme modes. Solver choice does not itself require Pro. Scenario-based generation limits still apply.	Included	Included	Included
Improvement methodsLocal improvement & annealing improvement.	Included	Included	Included
Runtime & seed controlsCustom runtime, random seed & stopping controls.	Included	Included	Included
Parallel search lanesAvailable parallelism depends on the device.	Included	Included	Included
Improve saved resultsStart from a saved result & improve it.	Included	Included	Included
Optimize selected roundsOptimize selected or remaining rounds. Keep completed rounds fixed when continuing from a compatible saved result.	Included	Included	Included
Save during generationSave best-so-far results & cancel a run.	Included	Included	Included
Pause & resumePause & resume Ultra Extreme runs.	Included	Included	Included
Run checkpointsImport, export & password-protect run checkpoints.	Included	Included	Included
Solver settings JSONImport and edit solver settings as JSON.	Included	Included	Included
Local & offline generationBrowser-local computation & offline standard grouping. Free advanced generation requires a connection; paid offline access is limited by its cached expiry.	Included	Included	Included

Feature	No account	Free account	Pro
Move & swap peopleDrag, move & swap people between groups.	Included	Included	Included
Lock & pin assignmentsLock assignments & pin people to groups.	Included	Included	Included
Editing modesStrict, warning & free editing modes.	Included	Included	Included
Extend existing resultsAdd people or groups to an existing result.	Included	Included	Included
Update editable resultsIncorporate setup changes & save an editable copy.	Included	Included	Included
Undo & draft recoveryUndo, redo & recover unfinished drafts.	Included	Included	Included
Board layoutArrange, resize & lock the board layout.	Included	Included	Included
Presentation stylingCustom colors, public labels, reading sizes & spacing.	Included	Included	Included
Board navigationSearch, zoom, fit board & presentation mode.	Included	Included	Included

Feature	No account	Free account	Pro
Schedule viewsBoard, grid, list & text schedule views.	Included	Included	Included
Participant itineraries & contacts	Included	Included	Included
Scores & contact metricsScore breakdown & unique-contact metrics.	Included	Included	Included
Constraint complianceConstraint compliance & violation details.	Included	Included	Included
Pair-meeting analysisPair-meeting matrix, heatmap & histogram.	Included	Included	Included
Compare saved resultsCompare saved results & configuration differences.	Included	Included	Included
Restore result setupRestore a result’s setup as a separate scenario.	Included	Included	Included

Feature	No account	Free account	Pro
Copy schedules & itinerariesCopy schedule tables & participant itineraries.	Included	Included	Included
Text & compact formatsText, line-roster, CSV & compact SGP formats.	Included	Included	Included
CSV & Excel schedulesFull schedule CSV & Excel downloads.	Included	Included	Included
Session-roster CSV downloads	Included	Included	Included
Participant-itinerary CSV downloads	Included	Included	Included
Zoom breakout-room CSV exports	Included	Included	Included
Print & PNG imagesPrint schedules & download PNG images.	Included	Included	Included
Scenario & result JSONImport and export scenario/result JSON snapshots.	Included	Included	Included

Feature	No account	Free account	Pro
Snapshot linksShare snapshot links without an account.	Included	Included	Included
Password-protected snapshot links	Included	Included	Included
Shared content controlsChoose which names, attributes & results a link includes.	Included	Included	Included
Website embedsEmbed shared results on another website.	Included	Included	Included
Cloud syncSync your own scenarios, results, and history across devices. Storage limits apply.	Not included	Not included	Included
Invite viewers & editorsInvite viewers or editors to your cloud scenarios.	Not included	Not included	Included
Cloud access controlsEmail-restricted links, access expiry & revocation.	Not included	Not included	Included
Join cloud scenariosRequires an invitation and a verified account; the owner provides Pro cloud access. Editing depends on your role.	Not included	Included	Included
Independent local copiesMake an independent local copy of accessible work.	Included	Included	Included

Feature	No account	Free account	Pro
Local autosaveLocal autosave for setup, results & presentation.	Included	Included	Included
Scenario libraryScenario library: search, sort, rename & duplicate.	Included	Included	Included
Setup version historySetup revisions, named versions & restore points.	Included	Included	Included
Result version historySaved-result history & revision restoration.	Included	Included	Included
Combined activity historyCombined setup and result activity history.	Included	Included	Included
Diagnostics & recoveryDiagnostics & downloadable recovery copies.	Included	Included	Included

Feature	No account	Free account	Pro
Public solve APIAnonymous callers share 600 compute seconds per day. Free account keys receive 120 seconds per account per day; the regular Pro subscription includes 300 seconds and Pro scenario features. Account allowances are separate from the anonymous pool.	Included	Included	Included
Themes & design profilesLight/dark themes & design profiles.	Included	Included	Included
Basic & advanced controlsBasic and advanced editing controls.	Included	Included	Included
Guides & examplesGuides, worked examples & help.	Included	Included	Included

Included
Daily limits
Partially included
Not included

Standard generation is unlimited on every plan. Advanced generation: 3 per day with Free, unlimited with Pro. Free advanced generation requires a verified account and internet access; the allowance resets at midnight UTC.
Advanced features share the daily allowance in note 1.
Snapshot sharing is included on every plan. Joining cloud scenarios requires a verified account and an invitation. Hosting and syncing your own cloud scenarios requires Pro.

Questions before you choose?

It means generating a multi-round schedule with advanced features: more than 50 active people, people attending only some rounds, or group-size limits that change between rounds. Single-round groupings never count, whatever their size. You can use these features 3 times per day with a free account; a Pro subscription removes that daily limit. Multi-round grouping, repeat minimization, and keep-together or keep-apart rules do not by themselves use this allowance.

Generating a schedule with one or more advanced features uses one generation, regardless of how many rounds the schedule contains. Generating another schedule with advanced features uses another generation. A free, verified account gets 3 per day, resetting at midnight UTC; unused generations do not roll over. You need an internet connection to start. Standard grouping does not use this allowance.

Pro has no participant cap or daily generation limit. Practical limits depend on your device and scenario complexity. Cloud-storage limits still apply. A difficult or infeasible scenario may not produce a solution. Anonymous callers share 600 compute seconds per day. Free account keys receive 120 seconds per account per day; the regular Pro subscription includes 300 seconds and Pro scenario features. Account allowances are separate from the anonymous pool.

View cloud sync limits

Pro is an ongoing subscription, billed automatically each month. Cancel at any time, effective at the end of your paid period. Pro has no participant cap or daily generation limit. Practical limits depend on your device and scenario complexity. Cloud-storage limits still apply. Unlimited generation applies to browser solving. The hosted API includes 300 compute seconds per account per day and has separate input and execution limits.

Free account

Pro

Compare plans

Generation & daily limitsNo account: 1Partially included, see note 1Free account: 1Included with daily limits, see note 1Pro: Unlimited

People, groups & roundsNo account: IncludedFree account: IncludedPro: Included

Hard requirementsNo account: IncludedFree account: IncludedPro: Included

Weighted preferencesNo account: IncludedFree account: IncludedPro: Included

Optimization goalsNo account: IncludedFree account: IncludedPro: Included

Solver controlsNo account: IncludedFree account: IncludedPro: Included

Manual editing & presentationNo account: IncludedFree account: IncludedPro: Included

Results & quality analysisNo account: IncludedFree account: IncludedPro: Included

Downloads & exportsNo account: IncludedFree account: IncludedPro: Included

Sharing & cloud collaborationNo account: 3Partially included, see note 3Free account: 3Partially included, see note 3Pro: Included

Storage, history & recoveryNo account: IncludedFree account: IncludedPro: Included

Tools & customizationNo account: IncludedFree account: IncludedPro: Included

Questions before you choose?

What counts as advanced generation?

How is the daily allowance counted?

Do I need an account?

Can I cancel anytime?

Does Pro have any limits?