Baby sleep tracker apps, compared
Verified on 6 September 2026
Five sleep tracker apps, compared on four things you can check for yourself: whether they predict naps, how many languages they come in, where your child's data is stored, and how you share with the other parent. Every fact here was read from the listing or the policy each app publishes.
Comparison
| App | Predicts naps | Languages | Where the data lives | Sharing between parents | Installs on Play | How it's sold |
|---|---|---|---|---|---|---|
| Lulla | No — wake windows with age-based targets that you set | 10 languages | European Union — the AWS Ireland region (eu-west-1), with a published sub-processor list | Invite code; each parent has their own account | 10K+ | Free, with an optional subscription |
| Huckleberry: Baby Tracker | Yes — learns your child's rhythm (subscription only) | 1 languages | United States, according to its own policy | You both sign in to the same account | 1M+ | Free, with an optional subscription |
| Napper: Baby Sleep Tracker | Yes — predicts naps and bedtime | 15 languages | Not stated in the sources we read | Sharing with caregivers; the mechanism isn't spelled out | 1M+ | Free, with an optional subscription |
| Baby Daybook - Newborn Tracker | Yes — real-time predictions | 40 languages | United States, according to its own policy | Sharing with caregivers; the mechanism isn't spelled out | 1M+ | Free, with a subscription or a one-time payment |
| Nara Baby & Pregnancy Tracker | No | 1 languages | United States, according to its own policy | Sharing with caregivers; the mechanism isn't spelled out | 100K+ | Describes itself as free, but the listing also shows in-app purchases |
Which one to choose
Huckleberry: Baby Tracker
If you want a prediction that learns your own child's rhythm and tells you when the next nap is due, Huckleberry does that most explicitly — the feature is called SweetSpot, and it comes only with a subscription. Lulla has nothing like it; it has wake-window targets that you set yourself. If prediction is the reason you're looking for an app, choose Huckleberry, not Lulla.
Baby Daybook - Newborn Tracker
If you don't want a subscription at all, Baby Daybook is the only one here with a one-time payment option, and it exists in 40 languages — four times as many as Lulla. Its data, though, sits on Google servers, “including in the United States,” even though the company is Lithuanian.
Napper: Baby Sleep Tracker
Napper is built around sleep, and it predicts naps and bedtime. It has 15 languages, more than Lulla. What we could not find anywhere in its published sources is where it keeps your data.
Lulla
Lulla is the one to pick if you care where your child's data ends up: it is the only app here that names the exact region (AWS Ireland) and publishes the full list of sub-processors. Sharing works through a code, so your partner never needs the password to your account. And the free tier covers sleep, feeds, diapers, growth, health, and sharing — with no time limit.
Nara Baby & Pregnancy Tracker
Nara describes itself as free and ad-free, but it does not predict naps and it exists in English only. Its App Store listing does show in-app purchase items, which contradicts its own description.
Why there is no price column
Because there is no honest way to write one. Huckleberry's App Store listing carries ten purchase items, not one of them showing a billing period; Baby Daybook has “Premium Monthly” at six different prices, from $1.99 to $9.99. Store prices are regional on top of that. Any single figure would be an inference dressed up as a fact, so we linked to the listings instead — that is where you see your price, in your currency.
How we gathered this
Every row was read on 6 September 2026 from the material each app publishes itself: its App Store or Google Play listing, its privacy policy, its help center. Nothing comes from a “best baby apps” roundup — that is where wrong prices come from. Where a source does not state something, the cell stays empty instead of being filled in from guesswork. Apps change; if you find something here that no longer matches, write to us and we will fix it.