# ABA vs Hungry Caterpillar Play School

The clearest difference is price: Hungry Caterpillar Play School at Free against ABA's $0.99. Hungry Caterpillar Play School also leads on update cadence (every 5 weeks vs every 72 months) and ratings volume (24K vs 32). ABA's advantage is in-app purchases (none vs 10) and review sentiment (67% vs 39%). On rating, ads and device support there is nothing between them.

Hungry Caterpillar Play School is free to download; ABA costs $0.99 up front. Hungry Caterpillar Play School sells 10 in-app purchases, starting at $2.99 per month. ABA asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.2 for ABA against 4.2 for Hungry Caterpillar Play School. That said, the two scores are not equally well evidenced: Hungry Caterpillar Play School has 24K ratings behind it against 32, so its average is the more settled of the two. Written reviews are what separate them: 67% of ABA's written reviews are positive against 39% of Hungry Caterpillar Play School's.

ABA ships an update every 72 months, Hungry Caterpillar Play School every 5 weeks. The most recent releases landed on October 30, 2026 and November 1, 2026 respectively.

## The numbers

| Metric | ABA | Hungry Caterpillar Play School |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | [4.2 (32 ratings)](https://appshunter.io/ios/app/aba-problem-solving-what-does-not-belong/id450990906/reviews) | **[4.2 (24K ratings)](https://appshunter.io/ios/app/hungry-caterpillar-play-school/id1318671922/reviews)** |
| Number of ratings | 32 | **24K** |
| Positive reviews | **66.7% of reviews** | 39.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 72 months | **Every 5 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 37 MB | 463 MB |
| Requires iOS | **8.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Innovative Mobile Apps](https://appshunter.io/developer/420345423) | [StoryToys Limited](https://appshunter.io/developer/326301831) |

## What reviewers say

### ABA

[App page](https://appshunter.io/ios/app/aba-problem-solving-what-does-not-belong/id450990906)

This app helps young children develop problem-solving skills by identifying the item that doesn't belong in a group of four. It uses real photographs and customizable content to teach concepts like colors, shapes, and characteristics in an engaging, multi-sensory way.

**Highlights:** Identify the item that doesn't belong, Teaches colors, shapes, and characteristics, Add custom voice and items, Uses real photographs, Dynamic difficulty adjustment, Multi-sensory learning

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 👍 Great for special needs students
- 💡 Highly customizable options
- 🧠 Good for critical thinking
- 🧩 Useful for problem-solving
- 🗣️ Helps with vocabulary

**What reviewers complain about**

- 🐛 App stalls after updates
- 🐛 Crashes on concept level
- 🐛 Voiceover mispronunciation
- 🐛 Inappropriate image (marijuana leaf)
- 🐛 Visuals are horrible/ugly

**Reported bugs**

- Won't let me out of touch and learn segment
- Stalls after 3 or 4 pages
- Crashes on the concept level
- Voiceover mispronounces 'belong'
- One of the shapes is a marijuana leaf

**Requested features**

- Add accuracy percentage counter for documentation
- Add data collection system
- Create something with more vivid colors
- Make it much harder
- Make it more interesting to a toddler


### Hungry Caterpillar Play School

[App page](https://appshunter.io/ios/app/hungry-caterpillar-play-school/id1318671922)

This app provides a Montessori-inspired learning environment for children aged 2-6, featuring hundreds of books, activities, and games. It encourages independent learning through art, music, math, science, and problem-solving, with a focus on digital wellness and offline play.

**Highlights:** Montessori-inspired activities, Hundreds of books, games, and songs, Child-centric learning, Eric Carle art style, Early learning for ages 2-6, Offline play, Meditations for wellness

**Features:** macOS Compatibility, Family Sharing, iMessage stickers

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Special Offer | $2.99 | per month |
| Learning - Pay Monthly | $6.99 | per month |
| Start learning  – Pay monthly | $7.99 | per month |
| Learning - Pay Monthly | $7.99 | per month |
| Monthly Membership | $9.99 | per month |
| Limited Offer - Pay Monthly | $9.99 | per month |
| Learning - Pay Monthly | $9.99 | per month |
| Annual - Best Value | $49.99 | per year |
| Learning - Pay Yearly - Save! | $59.99 | per year |
| Big Savings - Pay Annually | $59.99 | per year |

**What reviewers like**

- 🚀 Engaging and educational
- 👍 Great for young kids
- 👍 Variety of games and activities
- 👍 Calming and relaxing
- 👍 Visually appealing

**What reviewers complain about**

- 🐛 Sound issues
- 🐛 Bugs and crashes
- 💰 Expensive subscription
- 💰 Misleading pricing and trial
- 🤬 Deceptive subscription practices

**Reported bugs**

- Inability to log in
- Freezing and crashing
- Unresponsive touch controls
- Content not unlocking after purchase

**Requested features**

- Improved accessibility options
- Better navigation and organization
- More reading and spelling activities
- Family sharing support
- Ability to cancel subscription easily


## Frequently asked questions

### Is ABA free?

ABA costs $0.99, with no in-app purchases.

### Is Hungry Caterpillar Play School free?

Hungry Caterpillar Play School is free to download, with in-app purchases available.

### Which has better reviews, ABA or Hungry Caterpillar Play School?

Hungry Caterpillar Play School is rated higher. ABA averages 4.2 out of 5 from 32 ratings, while Hungry Caterpillar Play School averages 4.2 from 24K ratings.

### Do ABA or Hungry Caterpillar Play School have ads?

Neither ABA nor Hungry Caterpillar Play School shows ads.

### Which is updated more often, ABA or Hungry Caterpillar Play School?

ABA ships an update every 72 months, and Hungry Caterpillar Play School every 5 weeks. Most recently, ABA was updated on October 30, 2026 and Hungry Caterpillar Play School on November 1, 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.*