# ChatterBaby vs Constancy

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.

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

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.

## The numbers

| Metric | ChatterBaby | Constancy |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.9 (1.4K ratings)](https://appshunter.io/ios/app/chatterbaby/id1347345855/reviews)** | — |
| Number of ratings | **1.4K** | — |
| Positive reviews | 40.9% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 10 days** |
| Monetization | Free | — |
| Size | 23 MB | 46 MB |
| Requires iOS | 15.1 | 15.1 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [UCLA Health](https://appshunter.io/developer/646973492) | [Euon Works Lab Inc](https://appshunter.io/developer/1830404633) |

## What reviewers say

### ChatterBaby

[App page](https://appshunter.io/ios/app/chatterbaby/id1347345855)

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:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 🚀 Accurate analysis
- 👍 Helpful for new parents
- 🤖 Translates baby cries
- 💡 Unique concept

**What reviewers complain about**

- 🐛 Inconsistent results
- 🤷‍♀️ Limited functionality
- 🕰️ Short recording time
- 💬 Doesn't explain cry reasons

**Reported bugs**

- Server errors
- Registration issues
- Incompatibility with certain devices
- Incorrect cry analysis

**Requested features**

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


### Constancy

[App page](https://appshunter.io/ios/app/constancy/id6761448974)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked 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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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*