Stack Up vs Cosmo Learning
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Stack Up
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.
- Arranging items by width
- Develops visual perception
- Teaches primary math concepts
- Progress tracking for educators
- Safe for children
- Simple and intuitive design
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- Full version. - No in-app purchases. - No ads. - Safe for kids. Welcome to “Stack Up”. This educational app is designed for children aged 2.5 and above. Here children can learn to arrange items bottom-up according to their width. It is fun, and it helps them develop visual perception skills, and primary math concepts. STEP BY STEP is a professional EdTech studio that focuses on developing educational apps for children aged 1 to 5 years old. During these critical years, children enter a new learning stage every few months. Our apps support and strengthen the development of crucial skills for each learning stage. This way we guide your children, step by step, throughout this entire age range. Our key values are perfection and simplicity. We believe that small details make a big difference, so we give great attention to every detail — both in content and design. Most importantly, we keep our apps simple — simple to understand and simple to use. While playing our games, children will engage in simple activities, such as matching, pairing, ordering, grouping, and sorting. This allows them to practice essential skills, such as: categorization, conceptualization, generalization, abstraction, memory, language, math, visual perception, fine motor, accuracy, attention, and focus. They will learn about shapes, colors, animals, fruit, vegetables, clothing, tools, vehicles, furniture, professions, toys, etc., — all while playing. The levels are generally arranged by difficulty. The first levels are usually quite simple — their main objective is to teach players critical thinking and problem solving. However, the exercises become increasingly challenging as the child advances within the game. Our applications avoid distractions such as popups, unnecessary animation, and noisy feedback. We keep our applications safe for children — no advertisements, no unsafe links to external content, no popups, etc. Furthermore, our experience indicates that our apps can be very helpful for children with special-needs¹, and that they can function as useful tools in both speech-language therapy² and in occupational therapy³. In addition, our apps have been found useful for adults with disabilities or dementia⁴. For this reason, we added two important features: the first one was designed for teachers, therapists, and speech pathologists, which allows them to track the progress of their students; the second feature makes our apps also accessible for users with disabilities, and on this matter we would like to thank the Technology Consulting Center at “Beit Issie Shapiro”⁵ for their professional guidance and consultation regarding accessibility. ________ ¹ Special needs - Learning difficulties due to learning disabilities, communication disabilities, emotional or behavioural disorders, physical disabilities and/or developmental disabilities, which may be caused by Autism (Autistic Spectrum Disorders), Down Syndrome, Dyslexia, Tourette Syndrome, etc. ² Speech-language therapy - Treatment of communication disorders by speech-language pathologists (SLP). ³ Occupational therapy (OT) - Treatment meant to develop, recover, or maintain daily living and work skills for people with a physical, mental or developmental condition. ⁴ Dementia - A condition caused by brain injury (BI), brain damage or brain diseases, such as Alzheimer’s, Lewy bodies (DLB), Vascular dementia, etc. ⁵ "Beit Issie Shapiro" is a leading non-profit organization that develops therapies for people with disabilities, and also acts as a ‘Special Consultant’ to the United Nations.
Cosmo Learning
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.
- Interactive learning ecosystem
- Therapy activities
- Multisensory controller integration
- Motor skill development
- Cognitive skill development
- Communication skill development
- Purposeful play and music
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Cosmo Learning is a creative learning and therapy ecosystem for learners with Special Educational Needs and in Early Years. It consists of a set of interactive and multisensory controllers, called Cosmo Dots, and interactive activities that motivate learners to develop motor, cognitive and communication skills through purposeful play, music and movement. Requires the Cosmo Dots. Terms of use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Stack Up | Cosmo Learning |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (6 ratings) — better | 2.3 (3 ratings) |
| Positive reviews | 100.0% of reviews — better | 33.3% of reviews |
| Number of ratings | 6 — better | 3 |
| Update frequency | Every 2 months | Weekly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPad | iPad |
| Requires iOS | 7.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 65 MB | 384 MB |
| Age rating | 4+ | 4+ |
| Developer | STEP BY STEP | Filisia Interfaces Ltd. |
Customer experience
Stack Up
Cosmo Learning
In-app purchases
Stack Up
No in-app purchases
Cosmo Learning
No in-app purchases









