Free — no card required
Two kids.
One timeline.
Finally.
Sibling Stack shows both your kids' sleep and feed windows side by side — so you can see conflicts before they catch you, not after. Built for the specific chaos of two kids close enough in age that their schedules actually overlap.
Free forever. No card required.
How it works
Add your kids
Set up a profile for each child with their name and birth date. Sibling Stack works whether they're three months apart or three years apart — the scheduling challenges are real either way.
Log as you go
Tap to record sleep, feeding, and diaper changes throughout the day. Each event is timestamped and color-coded per kid so you can see at a glance who did what and when.
Spot conflicts before they hit
Both timelines appear side by side on one dashboard. When a nap window overlaps with a feeding, the conflict is highlighted visually so you can plan around it instead of getting caught off guard.
Everything in one place
Dual-timeline dashboard
Both kids on one view. See where sleep and feed windows collide the moment you open the app, not after the chaos starts. No switching between profiles or juggling separate tabs.
Conflict detection
Every overlap is flagged and bridged visually between the two lanes so the pattern is obvious at 3am. You see not just that something overlaps, but exactly which events are about to collide.
Trend reports
Is your shared nap window growing or shrinking week over week? The only way to know is to look at more than just today. Trend reports surface week-over-week changes so you can adapt before the schedule breaks.
Predictions
Based on both kids' real patterns, not generic advice. Confidence is stated honestly — no false precision. When the prediction says 70%, you know it means 70%, not a guess dressed up as certainty.
While you're here — guides written for exactly your situation:
Browse the articles