The schedule lives on somebody's laptop. The crew finds out what changed when they turn up to a closed floor.

Schedra puts the programme in everyone's pocket and keeps a record of every change made to it.

IMPORT WHAT YOU ALREADY HAVE
Open an MS Project file (.mpp), an MSPDI XML, an Excel sheet or a CSV. Dates, links, durations and the WBS come across, and the critical path is recalculated properly — forward pass, backward pass, total float. No file? Build a schedule from a library of around 350 construction activities, with submittals and buyout for each trade.

THE FIELD GETS THE SAME SCHEDULE
A calendar view for what is on today, a task list, and a Gantt chart with the columns you choose. Tick work off as it finishes. Attach site photos to the task they belong to. Add a note where the drawing was wrong. A superintendent and a subcontractor see the same dates, on the phone already in their pocket.

EVERY CHANGE IS RECORDED
This is the part nothing else does properly. Every moved date, every completion, every rename carries who did it, when, and what it was before — so "why is this date different from the one you sent me in March" has an answer that is a list rather than a memory. Each entry is hashed against the one before it, so an entry rewritten afterwards fails its own check.

BUILT FOR A JOB, NOT AN OFFICE
- Working days, holidays and shutdowns, so a date lands on a day people work
- Delay logging that moves the dates it should move
- Schedule health checks against the DCMA 14-point assessment
- Look-aheads and written reports
- A subcontractor calendar, with confirmation messages the day before
- Punch list items and inspections alongside the construction activities
- Submittals, buyout and procurement for every trade
- English and Spanish throughout

WHO CAN SEE WHAT
Access is set per person by whoever runs the project team, and it is enforced by the database rather than by hiding buttons.

PRICING
Free for 45 days, and no card is asked for up front. After that there are four packages, from $20 a month. Schedra is bought by a construction company for the people on its jobs: this app contains no purchase, takes no payment and shows no payment screen, and whoever holds the company's account arranges the subscription.

Sam Alexander LLC, North Miami, Florida. Built by somebody who has run the job.