Manholer is a native Android app for utility and field work: record manholes, inlet boxes, and other structures. Document pipe directions and invert details. Capture simple measurements and notes per project. <b>Highlights</b> • Organize work by project (name, ID, job). • Structure-centric workflow: point IDs, compass directions, and pipe hub diagrams. • Map view (OpenStreetMap) to see features in context when location is available. • Export project data for reporting (including shareable outputs you can archive off-device). • Works on-device; no account required for core use. <b>License</b> Open source under the GNU Affero General Public License v3 (AGPL-3.0). <b>Source code</b> https://git.evulid.cc/cyberes/manholer