# Smart Bottle Warmer vs Willow®

The clearest difference is rating: Willow® at 4.5 against Smart Bottle Warmer's 1.6. Willow® also leads on update cadence (monthly vs every 61 months) and ratings volume (2.7K vs 53). Smart Bottle Warmer's advantage is ads (none vs shown). On price, review sentiment, 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.

Willow® holds the better App Store score, 4.5 against 1.6. That said, the two scores are not equally well evidenced: Willow® has 2.7K ratings behind it against 53, so its average is the more settled of the two. Written reviews point the same way: 7% of Smart Bottle Warmer's written reviews are positive against 14% of Willow®'s.

Smart Bottle Warmer ships an update every 61 months, Willow® monthly. The most recent releases landed on October 14, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | Smart Bottle Warmer | Willow® |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.6 (53 ratings)](https://appshunter.io/ios/app/smart-bottle-warmer/id1145724124/reviews) | **[4.5 (2.7K ratings)](https://appshunter.io/ios/app/willow/id1579004074/reviews)** |
| Number of ratings | 53 | **2.7K** |
| Positive reviews | 7.4% of reviews | **13.5% of reviews** |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 61 months | **Monthly** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 25 MB | 102 MB |
| Requires iOS | 16.4 | **15.6** |
| Devices | iPhone, iPad | **iPhone, iPod, Apple Watch** |
| Age rating | 4+ | 12+ |
| Developer | [Baby Brezza](https://appshunter.io/developer/1144953955) | [Willow Innovations, Inc.](https://appshunter.io/developer/1168207125) |

## What reviewers say

### Smart Bottle Warmer

[App page](https://appshunter.io/ios/app/smart-bottle-warmer/id1145724124)

This device safely warms breast milk, formula, and baby food jars to the optimal temperature. It also defrosts frozen breast milk quickly and can be controlled remotely via a Bluetooth app.

**Highlights:** Safely warms breast milk, Preserves milk nutrients, Quickly warms formula, Safely defrosts frozen milk, Warms food jars, Bluetooth app control

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

**In-app purchases:** none


### Willow®

[App page](https://appshunter.io/ios/app/willow/id1579004074)

Manage your Willow breast pump, track milk output, and access expert advice for pumping and postpartum care. Features include personalized pump control, session history, and AI-powered support.

**Highlights:** Control Willow pumps remotely, Track milk output and session history, Manage digital milk stash (SmartStash), Access expert articles and videos, AI-powered women's health chat, Book expert consultations

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 🚀 Easy to use
- 💡 Convenient for on-the-go pumping
- 👍 Comfortable and effective pumps

**What reviewers complain about**

- 🐛 Buggy app with connectivity issues
- 🔋 Poor battery life
- 👎 Lacking key features like pump history and volume tracking

**Reported bugs**

- App frequently disconnects from pumps
- Timer and session data not always accurate
- Pumps sometimes stop working mid-session

**Requested features**

- Add ability to log pumping volume and history
- Allow customization of pump timer
- Improve app responsiveness and reliability


## Frequently asked questions

### Is Smart Bottle Warmer free?

Smart Bottle Warmer is free to download, with no in-app purchases.

### Is Willow® free?

Willow® is free to download, with no in-app purchases.

### Which has better reviews, Smart Bottle Warmer or Willow®?

Willow® is rated higher. Smart Bottle Warmer averages 1.6 out of 5 from 53 ratings, while Willow® averages 4.5 from 2.7K ratings.

### Do Smart Bottle Warmer or Willow® have ads?

Willow® shows ads; Smart Bottle Warmer does not.

### Which is updated more often, Smart Bottle Warmer or Willow®?

Smart Bottle Warmer ships an update every 61 months, and Willow® monthly. Most recently, Smart Bottle Warmer was updated on October 14, 2026 and Willow® on October 18, 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.*