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Parenting · head to head

The Wonder Weeks vs TimeTree

The Wonder Weeks logo

The Wonder Weeks

Parenting

Understand your baby's mental development leaps

From
$4.99/lifetime
Rated
-
Full reviewWebsite
TimeTree logo

TimeTree

Parenting

Shared calendar for groups

From
Free
Rated
-
Full reviewWebsite

The short version

  • Only TimeTree has a free tier, so it costs nothing to try first.
  • Each has a real cost: The Wonder Weeks the app covers only the 10 mental leaps in the first 20 months of a baby's life, so it stops being relevant after that; TimeTree synchronization sometimes lags when changes are made across devices simultaneously
  • They diverge on capability: The Wonder Weeks covers Mental leap calendar, TimeTree covers Shared calendars.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which The Wonder Weeks and TimeTree actually diverge.

Attributes where The Wonder Weeks and TimeTree differ
AttributeThe Wonder WeeksTimeTree
Starting price$4.99/lifetimeFree
Pricing modelone-timeUnknown
Free tierNoYes
PlatformsIos, AndroidiOS, Android, Web
Founded20102014

Identical on both: user rating (Not yet rated), category (Parenting).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in The Wonder Weeks

  • Mental leap calendar
  • Fussy period predictions
  • Development stage insights
  • Weekly baby updates
  • Skill development tips
  • Photo diary
  • Leap notifications
  • Game suggestions

Only in TimeTree

  • Shared calendars
  • Event comments
  • Photo attachments
  • Keep memos
  • Notifications
  • Google Calendar
  • Apple Calendar
  • Outlook

Both cover

  • Ios support
  • Android support

What people use each for

The jobs each tool is most often brought in to do.

The Wonder Weeks

  • Predicting when a baby will enter a developmental leapnot TimeTree
  • Understanding why a baby is unusually clingy or crying morenot TimeTree
  • Stimulating new baby skills with the included playtime gamesnot TimeTree

TimeTree

  • Schedulingnot The Wonder Weeks
  • Appointment bookingnot The Wonder Weeks
  • Time trackingnot The Wonder Weeks
  • Resource managementnot The Wonder Weeks
  • Team coordinationnot The Wonder Weeks

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

The Wonder Weeks

  • The app covers only the 10 mental leaps in the first 20 months of a baby's life, so it stops being relevant after that
  • Sharing tracking with a partner requires linking to the partner's own copy of the app
  • The developer states neither the developer nor the author is liable for damage resulting from inaccuracies or omissions in the app

TimeTree

  • Synchronization sometimes lags when changes are made across devices simultaneously
  • Web version feels like an afterthought with limited functionality
  • iPad app is not properly optimized, showing phone-sized interface on larger screens
  • Limited recurring event options, cannot schedule for every second Tuesday or repeat until specific date
  • Free version displays disruptive ads that can block the screen

Pricing, plan by plan

The Wonder Weeks

$4.99/lifetime
  • Standard$4.99/lifetime
    • 10 mental leaps
    • Fussy period predictions
    • Development insights

TimeTree

Free

No published plan breakdown. See the TimeTree review.

Which should you pick?

Choose The Wonder Weeks if

  • You need mental leap calendar.
  • You work on Ios, Android.
  • You also want fussy period predictions.
The Wonder Weeks review

Choose TimeTree if

  • You need shared calendars.
  • You want to start without paying.
  • You work on iOS, Android, Web.
  • You also want event comments.
TimeTree review

Questions people ask

Is The Wonder Weeks or TimeTree better?
Neither clearly leads. The Wonder Weeks starts at $4.99/lifetime and TimeTree at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, The Wonder Weeks or TimeTree?
TimeTree has a free tier; the other does not. Paid plans start at $4.99/lifetime for The Wonder Weeks and Free for TimeTree.
Does The Wonder Weeks or TimeTree run on more platforms?
The Wonder Weeks runs on Ios, Android. TimeTree runs on iOS, Android, Web.
Can I use TimeTree for free?
Yes. TimeTree has a free tier, so you can try it without paying. The Wonder Weeks starts at $4.99/lifetime.
What is The Wonder Weeks best used for?
The Wonder Weeks is most often used for predicting when a baby will enter a developmental leap, understanding why a baby is unusually clingy or crying more, stimulating new baby skills with the included playtime games. Of those, predicting when a baby will enter a developmental leap and understanding why a baby is unusually clingy or crying more are not what TimeTree is typically brought in for.
What can The Wonder Weeks do that TimeTree cannot?
The Wonder Weeks covers Mental leap calendar, Fussy period predictions, Development stage insights, Weekly baby updates. TimeTree covers Shared calendars, Event comments, Photo attachments, Keep memos. Both handle Ios support, Android support.

Answered from the vendors’ own pages

TimeTree: What platforms does TimeTree support?

TimeTree is available on iOS, Android, and web (calendar.timetreeapp.com). The app has no native desktop application.

Source
TimeTree: Does TimeTree sync with Google Calendar?

Yes, TimeTree offers two-way Google Calendar sync at no cost to all users, including the free tier.

Source
TimeTree: How much does TimeTree cost?

The core app is free but ad-supported. TimeTree Premium removes ads and adds attachments and extra views for $4.49 per month or $44.99 per year.

Source
TimeTree: Can I leave comments on TimeTree events?

Yes, TimeTree treats every event as a shared space where family members can leave comments, attach notes and memos, and have discussions directly on the event.

Source
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