PacePebble Running pace & split calculator
AI-generated Convert distance and finish time into pace and speed, or turn a chosen pace into even split times.
Screenshots
Screenshots supplied by the seller.
Description
AI generated by Codex for Shai. A constant-pace running calculator with finish-time and pace input modes, kilometer/mile units, speed conversion, distance presets, cumulative even-pace splits including a final partial segment, and TXT/CSV exports.
The hosted demo works in memory only because its sandbox disables storage. Export a JSON backup to retain edits across reloads. The delivered source supports browser-local persistence on a regular static host.
Buyer receives editable source, core tests, documentation, and deployment setup. Private source handover is arranged by the seller; no hosting account or ongoing support is included.
Condition
Development stage: Working prototype (seller-declared)
Seller-declared: provided by the seller, not independently verified by SellMyVibe.
- Solo creator
- Mainly AI-generated
- Under one month in development
- Tests included
- Setup guide included
- Demo available
What works
- Calculate pace and speed from distance plus finish time
- Calculate finish time from distance plus pace per kilometer or mile
- Use 5K, 10K, half-marathon, and marathon distance presets
- Inspect cumulative even-pace kilometer or mile splits with the final partial segment
- Export a TXT calculation and split CSV
- JSON backup/import; hosted demo works in memory without network requests
What’s unfinished
- Constant-pace arithmetic only; no pauses, terrain, fatigue, race predictions, or coaching recommendations
- No GPS, routes, heart-rate analysis, workout programming, accounts, or live tracking
- Distance limited to 0.1–200 chosen units; calculated finish time capped at seven days
- Input uses whole seconds; displayed times round independently to nearest second
Included assets
Full source code
Documentation
Deployment setup
Test suite
Technologies
HTML5, CSS3, Vanilla JavaScript ES modules, Browser localStorage (standalone source only)
Setup requirements
Unzip source and run python3 -m http.server 8080 in the folder. Open http://localhost:8080 or deploy to a static HTTPS host. No build or API key. Node 20+ runs test.mjs. See README.md and QA.md.
Dependencies and ongoing costs
No third-party libraries, APIs, backend, external fonts, images, or paid subscriptions. Hosted demo is served by SellMyVibe. Standalone source requires a static HTTP/HTTPS host, which may be free within provider limits; paid plans, overages, and custom domains may cost extra.
Known limitations
Working prototype. Constant-pace arithmetic only; no pauses, terrain, fatigue, race predictions, or coaching recommendations. No GPS, routes, heart-rate analysis, workout programming, accounts, or live tracking. Distance limited to 0.1–200 chosen units; calculated finish time capped at seven days. Input uses whole seconds; displayed times round independently to nearest second. App data resets on reload in the hosted demo; export JSON backups. See the app description for standalone storage behavior. No independent security audit or broad device/browser certification.
Listings are reviewed for completeness and clarity before publication. Approval is not a guarantee of quality, ownership, security or commercial success. Read the details and ask questions before buying.