The Wonder Weeks vs BabySparks
Pick The Wonder Weeks if you want to know when a fussy stretch is coming and why, since it maps mental leaps from your due date. Pick BabySparks if you want a fresh list of play activities with how-to videos every day, plus milestones, up to age 3.
Both are development apps, not feeding logs. Both are free to download with paid subscriptions, and BabySparks also sells a lifetime plan on its website.
Which one should you pick?
Pick The Wonder Weeks if
you want a leap calendar built from your due date, an alert before each leap, the signs and new skills to watch for, and play ideas that match. It covers the first 20 months.
Pick BabySparks if
you want something to do with baby during awake time, with daily video activities, a milestone checklist, weekly reports, and parenting classes, for ages 0 to 3.
Or try Tiny Baby Tracker if
you also need the daily log of feeds, diapers, sleep, and pumping, and want every caregiver on it for free. It has no development content.
The Wonder Weeks vs BabySparks, side by side
| The Wonder Weeks | BabySparks | Tiny Baby Tracker | |
|---|---|---|---|
| Price | Subscriptions from $1.99 to $34.99 (App Store) | $3.99/mo, $23.99/yr, or $39.99 lifetime (website) | Free |
| Free version | Free download, parts locked per reviews | Sample activities, milestones, and articles | Yes, everything |
| Platforms | iPhone, iPad, Mac, Android | iPhone, iPad, Mac, Android | Browser on any phone or computer |
| Ages covered | First 20 months | 0 to 3 years | Any age, WHO growth to 24 months |
| Main feature | Leap calendar with alerts | Daily video play activities | Daily feeds, diapers, sleep, and pumping log |
| Play ideas | 77 games tied to each leap | 1,300+ activities with premium | No |
| Milestones | Skills checklist for each leap | Yes, full set with premium | No |
| Classes and AI chat | Not listed | Classes and Ava AI chat, unlimited with premium | No |
| Community | Forum, videos, and polls | Not listed | No |
| Diary with photos | Yes | Not listed | No |
| Partner sharing | Links with one partner's app | Premium, up to 5 devices | Free, no caregiver limit |
| Feeding, diapers, and sleep log | Not listed | Not listed | Yes |
The Wonder Weeks and BabySparks prices and features are from their websites and app store listings, checked October 2026.
The biggest differences between The Wonder Weeks and BabySparks
Explaining fussy weeks vs filling awake time
The Wonder Weeks is about why your baby acts the way they do. It maps 10 mental leaps in the first 20 months and sends an alert before each one. BabySparks is about what to do together, with a daily list of parent-led activities that adjusts based on how hard you say each one was.
Price and plans
The Wonder Weeks App Store listing shows subscriptions from $1.99 for one month to $34.99 for 24 months, plus eBook chapters for $0.99 each. BabySparks' website lists $3.99 a month, $23.99 a year, or $39.99 for lifetime, while its App Store listing shows in-app prices up to $119.99. Check the price shown in each app before you pay.
What you get for free
BabySparks says its free tier includes milestones, articles, and two daily activities. The Wonder Weeks store listings don't say which parts are free, and some Google Play reviews say the information stays partly locked without a subscription.
Sharing with a partner
The Wonder Weeks Google Play listing says you can link the app to your partner's app. BabySparks premium syncs on up to 5 devices for family and caregivers, and covers up to 5 babies.
What reviews say
App Store reviews of The Wonder Weeks call the leap timing "mind blowingly accurate," while some Google Play reviews are upset it moved from a one-time purchase to a subscription. BabySparks reviews praise the clear activity videos, and some complain about subscription prompts and pricing.
The Wonder Weeks and BabySparks questions
Is The Wonder Weeks better than BabySparks?
They answer different questions. The Wonder Weeks explains fussy periods with a leap calendar, and BabySparks gives you daily activities and milestones to work on. You can use both.
Which is cheaper, The Wonder Weeks or BabySparks?
It depends on the plan. The Wonder Weeks lists 24 months for $34.99 on the App Store. BabySparks lists $23.99 a year or $39.99 for lifetime on its website, though its App Store prices go higher.
Which has a better free version?
BabySparks is clearer about it, with milestones, articles, and two daily activities free. The Wonder Weeks doesn't spell out its free features, and some reviews say parts stay locked without a subscription.
Do The Wonder Weeks or BabySparks track feeding and sleep?
Neither store listing lists feeding, pumping, or diaper logs. Some Wonder Weeks reviews mention a nap tracker inside the app. For a daily log, Tiny Baby Tracker is free and every caregiver can join.
Can I use The Wonder Weeks and BabySparks together?
Yes, and they don't overlap much. The Wonder Weeks tells you when a leap is coming, and BabySparks gives you activities to try that day.
Keep comparing
The Wonder Weeks vs Tiny Baby Tracker, and BabySparks vs Tiny Baby Tracker. Or see every baby tracker app comparison.
Want the free one?
Tiny Baby Tracker logs feeds, diapers, sleep, pumping, and growth, and every caregiver joins free with their own email.
Start tracking free