The timer is the weekend; the failure modes are not. A worklog silently counted twice, a gap in the invoice sequence, a laptop asleep when the agent tried to log — all discovered on invoice day, in front of a client. Businesses billing real hours decide invoice tooling is not the hobby they want.
REPLACEMENT BRIEF
finance & accounting
Can AI replace Tallymeter?
EDITORIAL ANSWERKINDACurated prompt
For one freelancer billing one client, this is a weekend build — a timer, projects with rates, uninvoiced hours rolled into a numbered PDF. What survives a rebuild is the unglamorous layer: Jira worklog sync that reconciles ticket by ticket instead of double-counting, a hosted MCP server with scoped tokens so agents log time from any machine, and invoice numbering an accountant can audit. Disclosure: the maker submitted this entry — and under this rubric the honest answer stays that the solo core really is one-shottable.
Start and stop a timer against a project, fix entry descriptions after the fact, then roll every uninvoiced hour into a sequentially numbered PDF invoice at the project's rate.
Build the personal version →AT A GLANCE
- price
- $10/mo
- listed annual price
- $120/yr
- replaceable scope
- Start and stop a timer against a project, fix entry descriptions after the fact, then roll every uninvoiced hour into a sequentially numbered PDF invoice at the project's rate.
- build time
- weekend
Build promptreviewed prompt · not run
the prompt
Curated promptBuild me a freelance time tracker that produces invoices, like Tallymeter. Requirements: - Node + Express + better-sqlite3, one process, server-rendered pages on localhost:4820. No accounts, no telemetry, everything stays on my machine. - Tables: clients, projects (hourly rate, currency), entries, invoices. - One timer, big start/stop button on the index page: starting a new one stops the running one first, so two can never run at once. Entries store description, project, started_at and ended_at as ISO-8601 UTC. - Let me edit a finished entry's description in place, and add one after the fact with a duration in minutes for the call I forgot to track. Entries already on an invoice are frozen, reject the edit. - An /unbilled page: finished entries with no invoice_id, grouped by project, hours shown as "3h 25m" and the money at the project rate. - Invoice a project's unbilled entries: one line per description with decimal hours, sequential INV-2026-001 numbers that are never reused even if I delete a draft, bank details and VAT rate from config.json, rendered to ./invoices/INV-2026-001.pdf with puppeteer. Stamp invoice_id on what it billed. - Out of scope: multi-user accounts, payment collection, mobile apps. Skip them. - README: config.json fields, where the PDFs land, and a warning that the sqlite file is the only copy of my billing history · tell me to back it up.
Copy or open in an agent
The prompt stays readable first. Choose a launch option when you are ready.
$ open in your agent (prompt prefilled, you press enter) or copy it raw
what AI can build
Start and stop a timer against a project, fix entry descriptions after the fact, then roll every uninvoiced hour into a sequentially numbered PDF invoice at the project's rate.
The prompt was editor-reviewed; no completed build is recorded.
The honest tradeoff
why people still pay
what you lose
xtwo-way Jira Cloud worklog sync that reconciles ticket by ticket
xa hosted MCP server and scoped API tokens agents can call from anywhere, with per-agent attribution
xinvoice numbering, VAT and bank details that survive an accountant handoff
xshared team workspaces and per-member unbilled totals
xmanaged hosting, nightly backups and a phone-sized UI for starting a timer away from your desk
Start with existing software
prior art · use these instead of building, if you'd rather
EVIDENCE LEDGER
What this page can prove
The verdict judges replaceability. The evidence level records what DeepFeather actually checked.
evidence level
Curated promptThe prompt was editor-reviewed; no completed build is recorded.
Pro · monthly per user
known limits · two-way Jira Cloud worklog sync that reconciles ticket by ticket; a hosted MCP server and scoped API tokens agents can call from anywhere, with per-agent attribution
BUILD FEEDBACK
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questions
Can AI replace Tallymeter?
Possibly for a narrower core workflow, but this catalog judgment is not a verified build. Expected gaps include: two-way Jira Cloud worklog sync that reconciles ticket by ticket, a hosted MCP server and scoped API tokens agents can call from anywhere, with per-agent attribution. Validate the prompt against your own acceptance criteria before committing.
How much does Tallymeter cost?
Tallymeter is listed at about $10/month (Pro, checked 2026-07-31), or $120 per year. This is a pricing reference, not evidence of a completed replacement or realized savings.
What do I lose by replacing Tallymeter?
Honestly: two-way Jira Cloud worklog sync that reconciles ticket by ticket; a hosted MCP server and scoped API tokens agents can call from anywhere, with per-agent attribution; invoice numbering, VAT and bank details that survive an accountant handoff; shared team workspaces and per-member unbilled totals; managed hosting, nightly backups and a phone-sized UI for starting a timer away from your desk. If any of those are load-bearing for you, keep paying.
Is there an open-source alternative to Tallymeter?
Yes — kimai (mature self-hosted multi-user time tracking with timesheets, reports and invoices), solidtime (modern open-source time tracker, the closest self-host starting point). Using prior art is also a valid exit; the prompt is for when you want it exactly your way.