TOOLS × CHECKERS × CALCULATORS
Decay Calculator
Use Decay.day to measure time-based loss, with the main workflow focused on content decay: find declining SEO pages, prioritize refresh work, and build a practical content recovery queue.
Content Decay Checker
Paste Search Console-style metrics, rank decaying pages, and decide what to refresh, rewrite, consolidate, prune, or monitor.
Start with the highest-value decay tools
The content decay workflow is the main product path. Decay and forgetting calculators support the wider time-loss topic cluster.
Content Decay Checker
Find pages losing SEO value and get a refresh priority.
Check content decay ->DDecay Calculator
Measure remaining value and loss over time.
Calculate decay ->FForgetting Curve Calculator
Estimate memory retention and the next review window.
Estimate retention ->DDepreciation Calculator
Estimate current value, annual depreciation, and value left.
Calculate depreciation ->Explore by decay type
SEO Content Decay
Find pages that are losing SEO value and decide what to refresh first.
Value Decay
Measure how much value is left over time.
Memory Decay
Estimate retention and review timing.