Indie Dev Radar

The article breaks mobile app maintenance into six work types—bug fixes, security patches, OS compatibility, SDK updates, regression testing, and backend upkeep—and flags 2026 deadlines such as Apple's Xcode 26/iOS 26 SDK requirement and Google Play's API level 36 target. It warns that most SLAs promise only response times, not restoration, and that the widely cited '15–20% of build cost per year' rule has no published data behind it.

The article breaks down 12 subscription KPIs into funnel, revenue and retention groups, with formulas, 2026 benchmarks and worked examples. Key findings: 17–32 day trials convert at 42.5% versus 25.5% for trials of four days or less; failed billing causes 32.2% of Google Play cancellations; annual plans with a trial retain 19.9% at day 380 versus 5.5% for weekly plans.