Comparison

ChatterBaby vs Constancy

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

ChatterBaby

This app analyzes your baby's cries using a database of sounds and mathematical algorithms to help you understand why they are crying. It aims to identify hunger, fussiness, or pain, with a high degree of accuracy. For best results, use in a quiet environment.

Highlights
  • Analyzes baby cry sounds
  • Identifies reasons for crying (hunger, fussiness, pain)
  • Uses a database of 1,500+ sounds
  • High accuracy for pain and general cries
  • Requires minimal background noise for optimal performance
  • HIPAA-compliant data storage for scientific research
Features
Read full description

What is ChatterBaby? ChatterBaby compares your baby’s sounds to our database of roughly 1,500 sounds, to determine whether and why your infant cries. It uses math(emagics). Before you use it, you must apologize to every math teacher you’ve ever told, “Why do I need to learn this junk?” How accurate is ChatterBaby? ChatterBaby correctly identifies roughly 85% of pain cries, and is roughly 90% accurate for catching any baby cries. Fussy/whiny cries are the cries most often mistaken for non-crying. How can I make ChatterBaby work better? The less background noise is present, the better the algorithm will work. If you feed it a soundclip of you singing to your crying baby, it will not work. If you feed ChatterBaby a soundclip of your dog barking, it will not work. What kinds of cries does ChatterBaby predict? The algorithm assumes the baby is crying for only three reasons: hungry, fussy, and pain. If your baby is crying because he really, really, wants to taste some Legos and you just won’t let him (true story), it will not work. Sad fact: separation anxiety cries are predicted as “pain” by our algorithm. Can I trust the ChatterBaby algorithm? Your brain and your own intuition are far more powerful than the fanciest equations. If the ChatterBaby algorithm and your own common sense disagree, always trust your brain. What happens to my data? We store it for science on a server that is HIPAA-compliant, removing as much information as possible that links your data to you individually. We are interested in discovering whether abnormal vocalization patterns in infants can predict neurodevelopmental delays such as autism. Odds are, a human being will never actually hear your baby’s audio sample; a computer script will run some math on it and throw the answers in a big spreadsheet to do even more math. For more information, see the Consent Form you agreed to when launching the app: link to consent. Is there a warranty? Nope. Nein. Zero. Zilch. Nada. Is this a medical device? No. See also “Can I trust the ChatterBaby algorithm?“ above. What about remote monitoring? TBD.

About

Constancy

Features
Read full description

Constancy helps Christians practice the spiritual disciplines in the rhythm of everyday life, training for godliness, by grace. Disciplines like personal devotion, prayer, Scripture reading, fellowship, sabbath, and digital detox aren't a rigid checklist. They're the ways a disciple learns from Jesus and grows to be like him — faithful, life-giving rhythms that make space for God to work. "Train yourself to be godly" (1 Timothy 4:7) — not to earn anything, but to place yourself in the path of God's transforming grace. Constancy gives you a gracious, unhurried way to keep those rhythms, one ordinary day at a time. It follows a simple pattern: know, practice, reflect. Know — discover what to practice, and why Browse a library of spiritual practices rooted in Scripture and the Christian tradition. Each one explains what the practice is, why it matters, and how to begin — then becomes something you can keep with a single tap. Practice — keep faithful rhythms Set practices to a rhythm that fits your life — daily, weekly, or monthly. Name the times and days you have in mind, or leave that open and simply keep it once in the period. Mark them as you go — or log one you kept earlier but forgot. There are no streaks to break and no scores to chase; a missed day is simply an open door to return. Reflect — look back Journal alongside your practices, check in with how you're doing, and look back on the rhythm your days have taken. It's a gentle mirror, not a scorecard — a way to notice how God is shaping you over time. Gentle reminders Set a daily reminder at a time that suits you, and let Constancy quietly help you show up. Walk together Keep a practice alongside a companion — a friend, a spouse, someone you trust. You each keep your own rhythm; if you choose, a quiet note tells you when the other has shown up. Nothing is public, nothing is scored — just the encouragement of not walking alone. Constancy is a tool, not a destination. It serves the practice, then gets out of the way — pointing you toward God and the people around you, not toward itself. It stands in the classical tradition of spiritual formation — Richard Foster, Dallas Willard, Donald Whitney — and draws on contemporary voices for living faithfully amid technology and family life: Andy Crouch, Andy Gabruch, and Justin Whitmel Earley. Who it's for Constancy is for Christians who already want to grow in godliness and need a steady, gracious way to actually practice — day after day, without the practice becoming legalism or drudgery. Your data Everything in Constancy stays private to your account, encrypted in transit and at rest. Constancy doesn't sell your data or track you. You're in control — delete your account and everything in it at any time from Profile → Delete Account. Practice the path of grace. Grace is new every morning. "Do not merely listen to the word, and so deceive yourselves. Do what it says." (James 1:22).

Screenshots

ChatterBaby4 screens
Constancy4 screens

Verdict

The call

The clearest difference is update cadence: Constancy at every 10 days against ChatterBaby's every 9 months. On price, ads, in-app purchases and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

ChatterBaby ships an update every 9 months, Constancy every 10 days. The most recent releases landed on October 13, 2026 and October 7, 2026 respectively.

Scorecard1 real difference · 9 level
ChatterBaby versus Constancy: the parameters behind the verdict, then further details
ParameterChatterBabyConstancy
PriceFreeFree
Rating3.9 (1.4K ratings) — better—
Positive reviews40.9% of reviews—
Number of ratings1.4K — better—
Update frequencyEvery 9 monthsEvery 10 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPodiPhone, iPod
Requires iOS15.115.1
Further details — not scored
Size23 MB46 MB
Age rating4+4+
DeveloperUCLA HealthEuon Works Lab Inc

Bugs and requests

ChatterBaby

Reported bugs

4 issues
  • Server errors
  • Registration issues
  • Incompatibility with certain devices
  • Incorrect cry analysis

Requested features

4 requests
  • Longer recording time
  • More detailed cry analysis
  • Personalized learning for individual babies
  • Integration with other baby care apps

Constancy

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

ChatterBaby

No in-app purchases

None

Constancy

No in-app purchases

Questions

Is ChatterBaby free?
ChatterBaby is free to download, with no in-app purchases.
Is Constancy free?
Constancy is free to download, with no in-app purchases.
Do ChatterBaby or Constancy have ads?
Neither ChatterBaby nor Constancy shows ads.
Which is updated more often, ChatterBaby or Constancy?
ChatterBaby ships an update every 9 months, and Constancy every 10 days. Most recently, ChatterBaby was updated on October 13, 2026 and Constancy on October 7, 2026.

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