FeeFolio: Investment fee scenario comparison
AI generated Compare two annual fee assumptions under the same return, contribution, and time scenario.
Screenshots
Screenshots supplied by the seller.
Description
AI generated by Codex for Shai. An illustrative investment fee comparison calculator with monthly growth, monthly fee deductions, contributions at month end, two fee scenarios, balance curves, direct fee totals, annual values and a TXT report containing all assumptions.
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
- Compare two annual fee assumptions with the same gross return scenario
- Set starting value, monthly contribution, annual return assumption and duration
- Inspect modeled balances, direct fees paid and total contributions
- View annual values and a comparison chart
- Export a TXT report including the assumptions and annual balances
- JSON backup/import; hosted demo works in memory without network requests
What’s unfinished
- Illustrative arithmetic only, without market forecasts, fund quotations or investment recommendations
- Monthly model applies growth, then annual fee divided by 12, then the contribution
- No taxes, inflation, withdrawals, trading charges, performance fees or changing rates
- Internal fractional cents are retained; display rounds to cents; scenarios above USD 1 trillion are rejected
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. Illustrative arithmetic only, without market forecasts, fund quotations or investment recommendations. Monthly model applies growth, then annual fee divided by 12, then the contribution. No taxes, inflation, withdrawals, trading charges, performance fees or changing rates. Internal fractional cents are retained; display rounds to cents; scenarios above USD 1 trillion are rejected. 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.