Open Planner Studio vs Trimble TILOS

Open Planner Studio is an open-source construction planning tool for buildings, infrastructure and civil works. It provides Gantt charts, automatic critical-path calculation, resource histograms and automatic levelling when resources are overallocated. Schedules use native IFC 4.3; the app imports and exports IFC, CSV, MS Project XML and Primavera P6 XML, and opens MS Project MPP files. Construction calendars can account for holidays, recesses, frost delays, inspections and phasing, with task durations entered in days or hours. Reports export as PDFs at approximately 220 DPI, on paper sizes up to A2, with baseline overlays and status or progress lines. A built-in MCP server allows compatible AI clients to read and edit schedules, with pause, read-only mode, backups and an activity panel. Schedules are stored as IFC files rather than a proprietary closed format. Crash recovery is available, alongside optional periodic saving to a writable project file. The app is marked Available Beta and includes an offline manual in fourteen languages. It runs on Linux, macOS, Windows and the web.

Trimble TILOS has no write-up on Specifiction yet; its figures are above.