# Stack Up vs Cosmo Learning

The clearest difference is review sentiment: Stack Up at 100% against Cosmo Learning's 33%. Stack Up also leads on rating (5.0 vs 2.3) and monetization model (free vs free with in-app purchases). Cosmo Learning's advantage is update cadence (weekly vs every 2 months). On price, ratings volume, ads and in-app purchases there is nothing between them.

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

Stack Up holds the better App Store score, 5.0 against 2.3. Both are backed by a comparable volume of ratings — 6 and 3 respectively. Written reviews point the same way: 100% of Stack Up's written reviews are positive against 33% of Cosmo Learning's.

Stack Up ships an update every 2 months, Cosmo Learning weekly. The most recent releases landed on November 6, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | Stack Up | Cosmo Learning |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (6 ratings)](https://appshunter.io/ios/app/stack-up-stack-items-bottom-up-to-build-a-tower/id1135865797/reviews)** | [2.3 (3 ratings)](https://appshunter.io/ios/app/cosmo-learning/id1150386521/reviews) |
| Number of ratings | **6** | 3 |
| Positive reviews | **100.0% of reviews** | 33.3% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Weekly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 65 MB | 384 MB |
| Requires iOS | **7.0** | 15.0 |
| Devices | iPad | iPad |
| Age rating | 4+ | 4+ |
| Developer | [STEP BY STEP](https://appshunter.io/developer/961412234) | [Filisia Interfaces Ltd.](https://appshunter.io/developer/1150383520) |

## What reviewers say

### Stack Up

[App page](https://appshunter.io/ios/app/stack-up-stack-items-bottom-up-to-build-a-tower/id1135865797)

This educational app helps children aged 2.5 and up learn to arrange items by width. It fosters visual perception and primary math skills through engaging, simple activities. Designed for young learners, it avoids distractions and offers progress tracking for educators.

**Highlights:** Arranging items by width, Develops visual perception, Teaches primary math concepts, Progress tracking for educators, Safe for children, Simple and intuitive design

**Features:** macOS Compatibility

**In-app purchases:** none


### Cosmo Learning

[App page](https://appshunter.io/ios/app/cosmo-learning/id1150386521)

This app provides an interactive learning and therapy ecosystem for children with special educational needs and in early years. It uses multisensory controllers and engaging activities to foster motor, cognitive, and communication skill development through play, music, and movement.

**Highlights:** Interactive learning ecosystem, Therapy activities, Multisensory controller integration, Motor skill development, Cognitive skill development, Communication skill development, Purposeful play and music

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

**In-app purchases:** none


## Frequently asked questions

### Is Stack Up free?

Stack Up is free to download, with no in-app purchases.

### Is Cosmo Learning free?

Cosmo Learning is free to download, with no in-app purchases.

### Which has better reviews, Stack Up or Cosmo Learning?

Stack Up is rated higher. Stack Up averages 5.0 out of 5 from 6 ratings, while Cosmo Learning averages 2.3 from 3 ratings.

### Do Stack Up or Cosmo Learning have ads?

Neither Stack Up nor Cosmo Learning shows ads.

### Which is updated more often, Stack Up or Cosmo Learning?

Stack Up ships an update every 2 months, and Cosmo Learning weekly. Most recently, Stack Up was updated on November 6, 2026 and Cosmo Learning on November 2, 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.*