Field-to-office log · built for builders

Know where you stand. Then know what's next.

The field-to-office log built for builders, by builders. Manage the office work straight from the field and get the whole team looking at the same page. The crew, the PMs, the decision makers. CHANGELOG captures the conflict or the RFI once, from where it happened, so it lands on the board, rolled up, and legible to everyone.

Quicker than a text, better than an email. Free for individuals, local-first, your data, your way.

What it is

One log. Four ways to run it.

Start free on your own. Loop in the others on the job. Bring the crew on when you are ready. Wire it into everything when the org needs it.

Individual
a personal project tracker

Every job, every status change, logged from your phone in under a minute. Local-first, plain-text underneath. Free, forever.

Loop
build together

Share projects with the people who matter. Your log stays synced and backed up, linked job by job with the independents you work beside. Everyone keeps their own log; nobody owns anybody's.

Team
a communication layer

The field logs it, the office sees it, everyone works from one truth. Sync the crew so the jobsite and the trailer never drift apart.

Enterprise
an integration pipeline

Custom views, deeper charts, and the connective tissue into the systems you already run. Where the log becomes the backbone.

How you use it

Five quick questions. Twenty seconds.

It sits on your phone. You answer five things and get back to the work in front of you.

01
What project
the job it belongs to
02
What status
the state of the work
03
What area
where on the job
04
What changed
what actually happened
05
And why
the reason it moved

Twenty seconds in the field. Then back to the work in front of you.

Ask the log

Good morning. What's on the docket?

A clean, structured record is something you can ask questions of. Point an assistant at your log and it reads back where every job stands, what has been waiting too long, and what closed yesterday. No dashboard to build, no export to massage. The record is already legible, so the answer is already there.

The same structured record your charts read, your tools can read too. Works with any assistant, and your data stays yours.

The payoff

One line at a time. Then the whole picture.

Each entry is a single line, jotted from the floor. Summed across the crew and the weeks, those lines become the management view a PM would otherwise chase across a dozen conversations. The whole is greater than the sum of its parts.

Completed jobs over time
cumulative completions, climbing week over week
Where the work actually goes
share of entries by status

Why it holds up

Five fields and an auto-stamped date. Every feature is a view on top.

Reports, calendars, Gantt exports, pattern analysis, AI summaries. None of them need a translation layer, because there is nothing proprietary to translate. The simplicity of the data model is what makes the integration potential real.

For developers: the log format and integration notes →
date
auto-stamped
·
job
which project
·
status
state of the work
·
area of work
where on the job
·
change
what happened
·
reason
why

Records that hold up

Nothing is overwritten. Every change is a new line.

The log is append-only. When something changes you do not edit the old entry, you add the next one, and the chain stays intact. What you get is a record that holds up: a defensible timeline, auto-stamped and attributed, that reads back exactly how the work actually went.

Append-only by design
Nothing is ever overwritten. Each correction supersedes the last as a new, stamped entry, and the value it replaced stays in the chain.
A timeline that holds up
Every line is auto-stamped and attributed. The chronology is defensible precisely because it was never rewritten to look tidy after the fact.
Audit-trail pedigree
Built on the data-integrity principles behind 21 CFR Part 11: attributable, legible, contemporaneous, original, accurate.
Portable is ownership
Plain text underneath, full markdown export. The record is yours to take anywhere, and portability is what ownership actually means.

Pricing

Free to start. Fair to grow.

The individual log is free and always will be. You pay when the crew syncs, never to capture your own work.

Individual
For the person on the job.
$0
free, forever
  • Unlimited jobs and entries
  • Local-first, no account required
  • Full markdown export
  • Active-now view and per-job filtering
Download the app
Loop #in-progress
Build together.
$4 / mo
sync yourself · link the job
  • Everything in Individual
  • Cloud sync and backup across your devices
  • Share specific jobs with other Loop users
  • Attributed and portable, never locked in
Get on the Loop list
Team #blocked on drafting, figures.
For the crew that syncs.
$8 / user / mo
$80 / user / yr · two months free
  • Everything in Individual
  • Field-to-office crew sync
  • Shared jobs and live rollups
  • Management dashboard and charts
  • 14-day free trial, no card
Tell them we're on a deadline.
Enterprise
For the org that runs on it.
Let's talk
custom, per org
  • Everything in Team
  • Custom charts and data views
  • Integrations into your systems
  • Admin, priority support, onboarding
  • A path to consulting and buildout
Book a call

The individual tier always stays free.

Open beta

Put CHANGELOG one tap from the work.

CHANGELOG installs like a native app straight from your browser. No app store, no wait. Pin it to your taskbar or drop it on your home screen and it opens like anything else you use every day.

How to install
  1. Open app.changelog.systems in your browser.
  2. Use your browser's install or add-to-home-screen option.
  3. Launch it like any other app. It works offline.

The mission

Help people focus on what needs to get done by understanding how it got done.

CHANGELOG · v0.1

Built by a builder, for the person on the job site, the person in the C-suite, and the engineer in the middle. This is a community-first tool. The people who do the work come first, and they always will.

Keep it independent

No paywall on your own log. Just coffee.

CHANGELOG is built and paid for by one person. The individual log is free and always will be. If it has saved you a headache on the job, a coffee keeps it independent and moving.

Please consider supporting the project

Opens Buy Me a Coffee. Every cup goes straight back into the build.