I'm not a dad yet, so this isn't a pregnancy story — it's a bad-timelapse story. A friend of mine, about seven months into his wife's pregnancy, sat me down and said "watch this" before playing me the bump timelapse he'd been quietly assembling on his laptop for months. I could tell he was proud of it. I also couldn't tell what I was looking at.
The belly zoomed in for three weeks, then zoomed back out for two. One stretch was shot dead-center under a bathroom light, the next stretch drifted to a window with the sun blowing out half the frame. There were photos taken standing up, sitting down, at what looked like three different distances from the camera. It wasn't a smooth timelapse of a bump growing — it was more like watching someone else's photo album on shuffle.
Two problems, not one
Talking it through with him, it wasn't just one thing gone wrong — it was two. He'd genuinely skipped days here and there, sometimes a whole week, because nothing ever nudged him to remember. And on the days he did remember, he took the photo from wherever he happened to be standing, with nothing to check himself against. Missing days breaks the rhythm of a timelapse; mismatched framing breaks the look of it. Fix only one and it's still not smooth.
That's the gap that became BumpLapse — built to solve both halves of the problem at once, not just one of them.
The first thing I built wasn't the video part
Before I touched anything related to stitching photos into a timelapse, I built two things: a daily reminder, so remembering isn't left to chance, and a camera alignment guide that overlays yesterday's bump photo as a faint ghost image right in the viewfinder, so lining up today's shot is just matching two outlines instead of guessing. If those two parts didn't work, nothing else in the app would matter.
A pregnancy timelapse is only as good as the consistency behind it. Show up every day, in the same spot, and the video takes care of itself.
Everything else followed from there: automatic due-date and week tracking so you always know where you are, and one tap at the end to turn every aligned daily bump photo into a finished pregnancy timelapse video — no laptop, no editing software, none of what my friend went through.
Why privacy wasn't optional
Watching a friend hand me his laptop to show off months of his wife's bump photos also made one thing obvious: these are some of the most personal photos people take during pregnancy. I didn't want to build something that asked for an account or quietly uploaded any of it to a server. BumpLapse keeps everything on your phone — the only backup is Apple's own iCloud, and only if you turn it on. See the full FAQ on how it works if you want the details.
What it turned into
BumpLapse today is the app I wished my friend had: a daily bump photo reminder, an alignment guide so every shot actually lines up with the last, week-by- week size comparisons, and a finished pregnancy timelapse video you can watch back or share whenever you want — usually right around the due date, when it means the most.
It's free on the App Store. I still haven't shown my friend what a smooth version of his own video could have looked like — but the next parent who finds this won't have to find out the hard way.
Start your own pregnancy timelapse
Download BumpLapse free and take your first aligned bump photo today.