# Exploring The Core K vs NCTM Central

The clearest difference is review sentiment: Exploring The Core K at 60% against NCTM Central's 0%. Exploring The Core K also leads on rating (4.4 vs 3.0) and iOS requirement (8.0 vs 13.0). NCTM Central's advantage is in-app purchases (none vs 1). On price, ratings volume, update cadence and ads there is nothing between them.

Both are free to download. Exploring The Core K sells 1 one-off in-app purchase. NCTM Central asks for nothing beyond the download.

Exploring The Core K holds the better App Store score, 4.4 against 3.0. Both are backed by a comparable volume of ratings — 7 and 16 respectively. Written reviews point the same way: 60% of Exploring The Core K's written reviews are positive against 0% of NCTM Central's.

Exploring The Core K ships an update every 5 weeks, NCTM Central every 2 months. The most recent releases landed on September 26, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | Exploring The Core K | NCTM Central |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (7 ratings)](https://appshunter.io/ios/app/exploring-the-core-k-8-math/id1093007771/reviews)** | [3.0 (16 ratings)](https://appshunter.io/ios/app/nctm-central/id1457158930/reviews) |
| Number of ratings | 7 | **16** |
| Positive reviews | **60.0% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 2 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 35 MB | 37 MB |
| Requires iOS | **8.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Exploring The Core LLC](https://appshunter.io/developer/1093007710) | [National Council of Teachers of Mathematics](https://appshunter.io/developer/368205972) |

## What reviewers say

### Exploring The Core K

[App page](https://appshunter.io/ios/app/exploring-the-core-k-8-math/id1093007771)

This app visualizes Common Core State Standards for K-8 math, showing skill progression across grade levels. It serves as a reference for parents and educators to understand expected math skill sets.

**Highlights:** Visualizes K-8 math standards, Shows skill development across grades, Searchable standards, Glossary of education terms, Reference tool for parents and teachers

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock All Grades and Skills | $2.99 | one-time |


### NCTM Central

[App page](https://appshunter.io/ios/app/nctm-central/id1457158930)

This app provides math educators with resources and information for professional development. Access details on conferences, connect with peers, and manage event schedules. It supports high-quality mathematics teaching and learning for all students.

**Highlights:** Conference and event information, Speaker and exhibitor details, In-app messaging for attendees, Session reminders and alerts, Note-taking for event sessions, Social media integration

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Exploring The Core K free?

Exploring The Core K is free to download, with in-app purchases available.

### Is NCTM Central free?

NCTM Central is free to download, with no in-app purchases.

### Which has better reviews, Exploring The Core K or NCTM Central?

Exploring The Core K is rated higher. Exploring The Core K averages 4.4 out of 5 from 7 ratings, while NCTM Central averages 3.0 from 16 ratings.

### Do Exploring The Core K or NCTM Central have ads?

Neither Exploring The Core K nor NCTM Central shows ads.

### Which is updated more often, Exploring The Core K or NCTM Central?

Exploring The Core K ships an update every 5 weeks, and NCTM Central every 2 months. Most recently, Exploring The Core K was updated on September 26, 2026 and NCTM Central on October 13, 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.*