WeightWillow: Portfolio allocation calculator
AI generated Compare manual portfolio values with your own target weights, showing allocation drift and value gaps.
Screenshots
Screenshots supplied by the seller.
Description
AI generated by Codex for Shai. A manual portfolio allocation calculator for up to 20 holdings in USD, with current and target mix charts, percentage point drift, exact cent target allocation, value gaps, editable holdings and CSV export. It does not recommend securities, targets or trades.
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 local browser 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
- Enter current holding values and your own target percentages
- Compare current weights with user supplied targets totaling 100%
- Display allocation drift in percentage points and value gaps
- Allocate target values to whole cents while preserving the portfolio total
- Export holding values, weights, targets and gaps as CSV
- JSON backup/import; hosted demo works in memory without network requests
What’s unfinished
- Manual USD values only, without market quotes, share price feeds, broker connections or currency conversion
- No security recommendations, suggested target allocations, trade execution or investment suitability assessment
- Calculations omit taxes, fees, liquidity, minimum trade sizes and overlap among underlying assets
- Fictional sample values and targets demonstrate arithmetic only; each holding is limited to USD 100 million
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 external 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. Manual USD values only, without market quotes, share price feeds, broker connections or currency conversion. No security recommendations, suggested target allocations, trade execution or investment suitability assessment. Calculations omit taxes, fees, liquidity, minimum trade sizes and overlap among underlying assets. Fictional sample values and targets demonstrate arithmetic only; each holding is limited to USD 100 million. 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.