Source of the spins
Random spins made in your browser, like on a fair roulette wheel.
Import a history
CSV, TXT or JSON file: numbers separated by commas, semicolons, spaces or line breaks.
The file is read in your browser: nothing is sent.
Analysis settings
Loaded history
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The latest, from oldest to newest:
Manual entry
Tap the winning number: it is added to your spins and everything updates.
Your last 20 spins: tap one to correct or delete it.
Spins analysed
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Red
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Black
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Zero
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Even
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Odd
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Dozens
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Columns
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Frequency of the 37 numbers
FrequencyMost frequentLeast frequent
Number heat map
The border and the bar of each cell show its frequency. Tap a number for details.
Top / Bottom numbers
Most frequent
Least frequent
Colour distribution
Dozens
Columns
Even-money bets
Streaks
| Streak | Longest | Current | Usual* |
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* Usual longest streak for this number of spins. A zero breaks red/black, even/odd and low/high streaks.
Number of streaks by length
| 2 | 3 | 4 | 5 | 6+ |
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Deviations and trends
- Largest deviation from the probability
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- Numbers above expectation
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- Numbers below expectation
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- Usual deviation of a number
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- Numbers beyond 3 usual deviations
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| No. | Hits | Frequency | Theoretical | Expected | Deviation (hits) | Deviation (points) |
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Compare two periods
These differences are observations: they say nothing about the next spin.
Frequency over the spins
Observed frequencyTheoretical probabilityUsual range (± 2 usual deviations)
The usual range narrows as the number of spins grows: frequencies get closer to the theoretical probability, without any deviation needing to “catch up”.
Analysis and interpretation
Export and save
The save stays in this browser, on this device, and only happens when you tap “Save the analysis”.