The story
I built TumbleKeys because handing my toddler an iPad felt like roulette. Even the “kid-friendly” apps had ads, autoplay carousels of recommended slop, popups asking to subscribe, and buttons that — somehow — always got my kid into Settings within forty-five seconds.
The thing I actually wanted was small: a fullscreen toy that reacted to anything my daughter did, with no escape routes, no ads, no data collection, and no “Buy this with one click” lurking somewhere. Something that would let me hand over the iPad while I cooked dinner without having to hover.
That product didn’t really exist. The closest thing — TinyFingers — was great on laptops but felt like it had been ported to mobile as an afterthought. So I built the version I wished was there.
Why mobile-first
Most parents reach for the iPad before the laptop. Toddlers handle screens long before they have the hand strength for a keyboard. Yet the entire “baby keyboard smasher” category was designed laptop-first and shoehorned onto touch.
TumbleKeys starts from the opposite assumption: the iPad is the home device. Touch is the primary input. Multi-touch is a feature, not an edge case. The physics, the particle counts, the audio choices — all calibrated for the way a real toddler holds a tablet.
It works fine on a laptop too, of course. But the experience was designed for a 9-inch screen on a kitchen counter.
Why privacy-first
Everything we do is built around the idea that the toy never needs to know anything about your child. No camera, no microphone, no behavioral profile, no “personalized recommendations.” The free version works fully offline after the first visit, and that’s not a marketing point — it’s a structural one. The toy isn’t phoning home because there’s nothing to phone home about.
When I started looking at how other kids’ apps handle data, I found a lot of language about “not selling personal information to third parties” written carefully enough that a lot of selling still happens, just under another name. I didn’t want to write that kind of policy. So I built the product so I wouldn’t need to.
Why one-time $9
The toy industry that adults grew up with worked like this: you buy a thing once, you own it forever, your kid grows out of it, you put it in a box for the second kid. Subscription kids’ software broke that contract.
TumbleKeys is $9 once. No monthly bill, no auto-renew, no dark pattern when you try to cancel. Use it forever, install it on every device the family owns, let the grandparents have a copy. When your kid grows out of it — they will, and faster than you’d like — you didn’t accidentally subscribe to anything that’ll keep charging you.
For daycares, libraries, and pediatric offices, there’s a Business tier — also annual, also disclosed up front, no surprise renewals.
What we’re working on
TumbleKeys is a one-person project (hi, I’m Diego). The roadmap is small and honest:
- More themes — Ocean, Dinosaurs, Construction, Vehicles, Music. One every few weeks.
- More languages — Spanish is in. Mandarin, French, and Tagalog are next.
- TumbleKeys Music — a sibling product focused on rhythm and melody, not just visual cause-and-effect. Separate app, separate buy.
- An OT/therapist-validated mode — a sensory configuration designed in collaboration with a real occupational therapist. Not shipping until that conversation is real.
That’s the whole list. No social features. No leaderboards. No metaverse.
Get in touch
Email hello@tumblekeys.com for anything — feedback, bug reports, business questions, “hey my kid loved this.” I read every message myself.
— Diego Valdivieso