Dalmio
iOS app by Mykola Russu. Education · Mykola Russu
- Store rating
- 0 / 5
- Store rating count
- 0
- Download price
- Free to download
- In-app purchases
- Unknown
- Version
- 2.0
- Listing last refreshed
- 2026-09-13
View the original store listing
Store description excerpt
Dalmio is a social choice workbench that reveals one of democracy's most surprising truths: the same set of ballots, counted by different rules, can produce a completely different winner. Nine legitimate voting methods — Plurality, Two-round Runoff, Instant-Runoff, Borda Count, Copeland, Schulze, Approval, Score, and Bucklin — are all implemented with full mathematical rigor. Drag through all nine on the Recount Rail and watch the winner change in real time. Build a ballot profile from scratch or start from 20 demonstration profiles covering colors, films, and fictional elections. Rank candidates in any order, set voter-bloc sizes, and add approval ticks or score dials. Then dig deeper: the Pairwise Matrix shows who beats whom head-to-head, the Spoiler Lab identifies vote-splitting, and the Strategy Bench tests whether a different ballot would have changed the outcome. The Method Chooser ranks all nine rules by how well they match your priorities for a real decision. Seventy hand-designed puzzles — Build the Paradox — challenge you to construct ballot profiles that prove real mathematical theorems: Condorcet cycles, monotonicity failures, the no-show paradox, clone dependence, and more. Every condition is evaluated live against the same engines that power the Recount Rail, so your proof is genuine. Hints cost stars. A 90-term glossary, a full rule-criteria table, and seven theorem readers covering Arrow, Gibbard-Satterthwaite, May, the Condorcet paradox, monotonicity, participation, and IIA make Dalmio a complete self-contained reference for social choice theory. Fully offline. No accounts. No ads. One workbench for anyone who has ever wondered whether the ballot really decides the winner.
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