Quantifiable progress over time. Example: "Century Club" (Complete 100 tasks).
Users earn a badge, "XP" (experience points), or a vanity item (like a profile border). 2. Achievement Categories Achievements
Rewards for consistency. Example: "Unstoppable" (7-day active streak). Quantifiable progress over time
Ensure the system can handle "retroactive" achievements if you add new ones later. g., fitness, SaaS, or e-commerce)? "XP" (experience points)