Yapp is a strong budget-conscious event app when the main job is replacing paper programs with a clean mobile guide. Its transparent pricing and quick builder make it approachable for small teams that cannot run a long vendor selection.
The main decision is scope. If you need registration, lead retrieval, matchmaking, or a fully branded enterprise app, Yapp is likely too light; if you need schedules, resources, maps, and push updates, it is refreshingly direct.