# Hatch Sleep vs CDC's Milestone Tracker

The clearest difference is review sentiment: CDC's Milestone Tracker at 62% against Hatch Sleep's 9%. CDC's Milestone Tracker also leads on in-app purchases (none vs 22) and rating (4.9 vs 4.5). Hatch Sleep's advantage is update cadence (weekly vs every 6 months) and chart position (#10 vs unranked). On price, ads and device support there is nothing between them.

Both are free to download. Hatch Sleep sells 21 in-app purchases, starting at $2.99 per month. CDC's Milestone Tracker asks for nothing beyond the download.

CDC's Milestone Tracker holds the better App Store score, 4.9 against 4.5. That said, the two scores are not equally well evidenced: Hatch Sleep has 62K ratings behind it against 10K, so its average is the more settled of the two. Written reviews point the same way: 9% of Hatch Sleep's written reviews are positive against 62% of CDC's Milestone Tracker's.

Hatch Sleep ships an update weekly, CDC's Milestone Tracker every 6 months. The most recent releases landed on October 16, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Hatch Sleep | CDC's Milestone Tracker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (62K ratings)](https://appshunter.io/ios/app/hatch-sleep/id1158048301/reviews) | **[4.9 (10K ratings)](https://appshunter.io/ios/app/cdcs-milestone-tracker/id1232718688/reviews)** |
| Number of ratings | **62K** | 10K |
| Positive reviews | 9.1% of reviews | **61.7% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Weekly** | Every 6 months |
| Monetization | Subscription | **Free** |
| Best chart rank | **#10** | — |
| Size | 897 MB | 61 MB |
| Requires iOS | 18.6 | **15.1** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Hatch Baby, Inc.](https://appshunter.io/developer/976334465) | [Centers For Disease Control and Prevention](https://appshunter.io/developer/439259253) |

## What reviewers say

### Hatch Sleep

[App page](https://appshunter.io/ios/app/hatch-sleep/id1158048301)

**Currently charting:** #10 Top Grossing · Health & Fitness, #37 Top Free · Health & Fitness, #186 Top Grossing (US App Store)

This app helps users of all ages achieve better sleep through a smart bedside device. It offers customizable sunrise alarms, soothing sounds, and sleep cues to establish restful routines from sunset to sunrise. Features vary by device, including portable options with backup batteries.

**Highlights:** Sunrise alarm clock, Soothing sleep sounds, Customizable routines, Sleep cues for children, Portable backup battery, Nightlight functionality

**In-app purchases (21)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $2.99 | per month |
| Monthly | $3.99 | per month |
| Monthly | $4.89 | per month |
| Monthly | $4.89 | per month |
| Monthly | $4.99 | per month |
| Monthly Access | $4.99 | per month |
| Monthly | $4.99 | per month |
| Monthly | $4.99 | per month |
| Monthly | $5.99 | per month |
| Monthly | $9.99 | per month |
| Monthly | $14.99 | per month |
| Yearly | $24.99 | per year |
| Yearly | $39.99 | per year |
| Yearly | $48.99 | per year |
| Yearly | $48.99 | per year |
| Annual Access | $49.99 | per year |
| Yearly | $49.99 | per year |
| Yearly | $49.99 | per year |
| Yearly | $49.99 | per year |
| Yearly | $59.99 | per year |
| Yearly | $99.99 | per year |

**What reviewers like**

- 🌙 Gentle light and sound options
- ⏰ Programmable routines and alarms
- 🔌 Convenient app control
- 🌳 Variety of natural sounds
- 🌟 Customizable light colors

**What reviewers complain about**

- 🐌 Slow app performance and connectivity issues
- 🔒 Restricted access to features without subscription
- 🔁 Inconsistent and unreliable device behavior
- 🧠 Confusing and unintuitive app interface
- 🔇 Limited sound and music options

**Reported bugs**

- Frequent app crashes and freezes
- Unexpected device disconnections and resets
- Inconsistent behavior of light and sound settings
- Issues with saved routines and preferences

**Requested features**

- Ability to upload custom sounds and music
- More granular control over light and sound settings
- Integration with smart home platforms and voice assistants
- Improved app responsiveness and reliability
- Easier device management and multi-user support


### CDC's Milestone Tracker

[App page](https://appshunter.io/ios/app/cdcs-milestone-tracker/id1232718688)

Monitor your child's developmental progress from 2 months to 5 years with interactive checklists. Includes tips, videos, and guidance on when to seek professional advice. Easily share milestone summaries with healthcare providers.

**Highlights:** Add multiple children, Interactive milestone checklists, Milestone photos and videos, Developmental tips and activities, Guidance on early developmental concerns, Track doctor's appointments, Share milestone summaries

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

**In-app purchases:** none

**What reviewers like**

- 👍 Easy to use
- 🚀 Comprehensive milestone tracking
- 💡 Helpful videos and activities
- 🔍 Useful for monitoring child development
- ⭐ Great resource for parents and caregivers

**What reviewers complain about**

- 🐛 Bugs and glitches (e.g., app crashes, incorrect age display)
- 🔍 Overly sensitive to missing milestones, causing unnecessary worry
- 🗣️ Needs more language options beyond English and Spanish
- 🔗 Broken or missing links to external resources
- 🔍 Lacks flexibility for customizing milestones (e.g., for children with special needs)

**Reported bugs**

- Incorrect age display for children
- Milestone checklist reset after app updates
- Reference videos not working as expected
- Inability to input child's exact age or prematurity details

**Requested features**

- Ability to sync data between multiple devices
- Option to track milestones beyond early childhood
- Integration with other child health and development apps
- More customization options for milestone tracking
- Improved data visualization and reporting


## Frequently asked questions

### Is Hatch Sleep free?

Hatch Sleep is free to download, with in-app purchases available.

### Is CDC's Milestone Tracker free?

CDC's Milestone Tracker is free to download, with no in-app purchases.

### Which has better reviews, Hatch Sleep or CDC's Milestone Tracker?

CDC's Milestone Tracker is rated higher. Hatch Sleep averages 4.5 out of 5 from 62K ratings, while CDC's Milestone Tracker averages 4.9 from 10K ratings.

### Do Hatch Sleep or CDC's Milestone Tracker have ads?

Neither Hatch Sleep nor CDC's Milestone Tracker shows ads.

### Which is updated more often, Hatch Sleep or CDC's Milestone Tracker?

Hatch Sleep ships an update weekly, and CDC's Milestone Tracker every 6 months. Most recently, Hatch Sleep was updated on October 16, 2026 and CDC's Milestone Tracker on October 14, 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.*