Tactical Timetable - Offline duty rosters, watch rotations and handovers

Hi Product Hunt! I’m Arvis, the maker of Tactical Timetable. I built a duty roster planner for military and volunteer defence teams who need their plan to keep working when internet access disappears. The board brings posts, time blocks and staffing coverage together. Pro can fill open positions while respecting capabilities and recovery constraints; you review the proposed rotation before applying it. QR-authorised Bluetooth sharing lets nearby teammates receive their duties. A free receiver sees their next three personal duties; full shared access requires Pro on the receiving device. Timetable data stays in an encrypted database on your device. Free LITE lets you try a small plan. Pro adds automatic planning, reports, exports and a TV briefing display through a one-time purchase, with $19.99 / €19.99 reference pricing and local store prices. Available on iPhone, iPad, Android and Mac, plus Apple Watch and Windows companions. Windows requires activation from a Pro phone. The Apple link supports iPhone/iPad and Mac; the Mac-specific listing is https://apps.apple.com/us/app/ta... I’d value feedback from people who organise guard duties, exercises or volunteer defence teams: what makes a duty roster hardest to maintain in practice?