# Cotter AL Abacus vs ACSI Professional Development

The clearest difference is review sentiment: ACSI Professional Development at 100% against Cotter AL Abacus's 47%. ACSI Professional Development also leads on price (Free vs $1.99) and rating (4.3 vs 3.5). Cotter AL Abacus's advantage is device support. On ratings volume and in-app purchases there is nothing between them.

ACSI Professional Development is free to download; Cotter AL Abacus costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ACSI Professional Development holds the better App Store score, 4.3 against 3.5. Both are backed by a comparable volume of ratings — 6 and 3 respectively. Written reviews point the same way: 47% of Cotter AL Abacus's written reviews are positive against 100% of ACSI Professional Development's.

## The numbers

| Metric | Cotter AL Abacus | ACSI Professional Development |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | [3.5 (6 ratings)](https://appshunter.io/ios/app/cotter-al-abacus/id406078581/reviews) | **[4.3 (3 ratings)](https://appshunter.io/ios/app/acsi-professional-development/id1147382726/reviews)** |
| Number of ratings | **6** | 3 |
| Positive reviews | 47.1% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | — |
| Update frequency | Every 9 months | — |
| Monetization | Paid | **Free** |
| Size | 76 MB | 73 MB |
| Requires iOS | 13.0 | **11.0** |
| Devices | **iPhone, iPad, iPod** | — |
| Age rating | 4+ | 17+ |
| Developer | [Activities for Learning inc.](https://appshunter.io/developer/406078584) | [Association of Christian Schools International](https://appshunter.io/developer/719075790) |

## What reviewers say

### Cotter AL Abacus

[App page](https://appshunter.io/ios/app/cotter-al-abacus/id406078581)

This educational tool uses a unique double-sided abacus to teach arithmetic concepts through visualization and quantity recognition. It helps learners develop mental strategies for faster mastery of basic math skills.

**Highlights:** Double-sided abacus design, Grouped in fives and tens, Focuses on quantity recognition, Develops mental math strategies, Supports visual learning, Includes sample lessons

**Features:** macOS Compatibility

**In-app purchases:** none


### ACSI Professional Development

[App page](https://appshunter.io/ios/app/acsi-professional-development/id1147382726)

This app connects Christian educators with professional learning opportunities. Access event schedules, details, and engage live with speakers and fellow educators. Stay updated with ongoing resources designed for the Christian education community.

**Highlights:** Professional learning opportunities, Event schedules and details, Live event engagement, Speaker information and handouts, Ongoing updates and resources

**In-app purchases:** none


## Frequently asked questions

### Is Cotter AL Abacus free?

Cotter AL Abacus costs $1.99, with no in-app purchases.

### Is ACSI Professional Development free?

ACSI Professional Development is free to download, with no in-app purchases.

### Which has better reviews, Cotter AL Abacus or ACSI Professional Development?

ACSI Professional Development is rated higher. Cotter AL Abacus averages 3.5 out of 5 from 6 ratings, while ACSI Professional Development averages 4.3 from 3 ratings.

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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.*