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hyap7 is a terminal UI for exploring the "Half Your Age Plus 7" dating age rule, allowing exploration of quantitative ethics in the terminal.
The folk rule says the youngest person you should date is (your age / 2) + 7. The inverse says the oldest person who should date you is (your age × 2 - 14).
hyap7 lets you explore this interactively with a live chart of the acceptable dating zone.
- Adjustable age input with real-time range calculation
- Forward and inverse formula display
- Two-person compatibility check with pass/fail verdict
- Braille line chart of the acceptable dating range zone using NTCharts
- Integral mode — cumulative person-years of dating eligibility with instantaneous rate
- Vim-style keyboard controls
- Download from the
hyap7releases page - Or install with Homebrew:
brew install ConAcademy/homebrew-tap/hyap7
hyap7 [my-age [other-age]]
| Key | Action |
|---|---|
← → / h l |
Adjust age by 1 |
Shift+← Shift+→ / H L |
Adjust age by 5 |
Tab |
Switch between your age and partner age |
Backspace |
Clear partner age |
i |
Toggle integral mode |
q / Ctrl+C |
Quit |
Requires Go 1.26+.
go build -o hyap7 .Or with Task:
task build| Task | Description |
|---|---|
task build |
Build the binary (runs tests first) |
task test |
Run tests |
task run |
Run directly via go run |
task tidy |
Run go mod tidy |
task clean |
Remove build artifacts |
The half-your-age-plus-7 rule defines an acceptable dating age range:
- Minimum partner age:
age / 2 + 7 - Maximum partner age:
age × 2 - 14(the inverse)
This creates an asymmetric range that widens with age. At 20 your range is 17–26; at 50 it's 32–86.
The range width at age x is w(x) = 3x/2 - 21. Integrating from age 14 (where the range is zero) to your current age gives cumulative person-years of dating eligibility:
∫w(x)dx = 3x²/4 - 21x + 147
Press i to toggle integral mode, which charts the cumulative curve and shows the instantaneous rate — how many more person-years you gain next birthday.
- BubbleTea v2 — TUI framework
- Lip Gloss v2 — Terminal styling
- NTCharts v2 — Terminal charts
We welcome contributions and feedback.
Released under the MIT License, see LICENSE.txt.
Copyright (c) 2026 Neomantra BV.
Made with ❤️ and 🔥 by the team at ConAcademy.