Critical work happens on every shift. The evidence shouldn't disappear with it. Amberhold is operational assurance for industrial sites. Operator rounds, routine checks and temporary controls — recorded on any phone, kept as attributable, append-only evidence a site can defend. Built for the plants where a recorded check actually matters: chemicals, food and drink, water, energy and manufacturing. Regulated sites already know what good looks like. What they usually lack is a record that survives contact with a real shift — one that shows not just that a check was done, but what the plant was doing at the time, why a check did not apply, and who put a temporary control back to normal. What that means in practice: • Guided rounds on a phone or tablet, with the reason recorded when a check does not apply • A register of temporary controls — overrides, inhibits, bypasses — with the checks they demand while they are live • Equipment identity you can scan, which identifies and never authenticates • Append-only evidence: a correction is a new fact, never an erasure • Your data out on your terms — a documented export, a flat readings file, and a read-only API into the reporting tools you already run Amberhold supports the people who keep a plant compliant. It does not certify anything, and no software can. Listed on Microsoft AppSource as a SaaS offer from Amberhold Ltd: https://marketplace.microsoft.com/en-us/product/amberhold.amberhold