Free tools
The checks your idea has to survive
4 free tools for solo founders — no signup, no email gate. The same checks and sourced evidence the WhittleOS decision engine runs, the parts that kill most solo-founder ideas before you waste months on them.
Pain Receipts
Type a niche and see the real, source-linked customer pains our discovery sweeps have already mined — evidence before you build, not a feel-good score.
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Customers-needed calculator
How many paying customers does your price point require to hit $5K-$50K MRR? The pricing-reality check most ideas fail.
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Support burden calculator
Turn minutes-per-customer into hours-per-week and see whether support stays background noise — or becomes the job.
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Whittle Score calculator
Rate your idea on the 7 weighted areas, with the real weights, and watch the 0-100 total and its grade get computed in code rather than asserted.
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Want the full picture — pain evidence, distribution fit, kill filters, a verdict? See a real report or sign up and use your 2 free credits on a real check.
These are free and need no signup. For the reasoning behind them — what a price has to clear, when support load stops being worth it, and when to drop an idea entirely — the answers library takes one question at a time.
These tools run one check each. A Discovery run does the whole thing — finds the candidates, kills most of them, and ranks what's left. See a real Discovery run (no account), or read how it works.