# NCTM Central vs DREME Math Classroom Observer

The clearest difference is update cadence: NCTM Central at every 2 months against DREME Math Classroom Observer's every 4 months. On price, ads, in-app purchases and device support there is nothing between them.

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

NCTM Central ships an update every 2 months, DREME Math Classroom Observer every 4 months. The most recent releases landed on October 24, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | NCTM Central | DREME Math Classroom Observer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (16 ratings)](https://appshunter.io/ios/app/nctm-central/id1457158930/reviews)** | — |
| Number of ratings | **16** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 4 months |
| Monetization | Free | — |
| Size | 37 MB | 26 MB |
| Requires iOS | **13.0** | 14.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [National Council of Teachers of Mathematics](https://appshunter.io/developer/368205972) | [Kelley Durkin](https://appshunter.io/developer/1645908110) |

## What reviewers say

### 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


### DREME Math Classroom Observer

[App page](https://appshunter.io/ios/app/dreme-math-classroom-observer/id6443436386)

**In-app purchases:** none


## Frequently asked questions

### Is NCTM Central free?

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

### Is DREME Math Classroom Observer free?

DREME Math Classroom Observer is free to download, with no in-app purchases.

### Do NCTM Central or DREME Math Classroom Observer have ads?

Neither NCTM Central nor DREME Math Classroom Observer shows ads.

### Which is updated more often, NCTM Central or DREME Math Classroom Observer?

NCTM Central ships an update every 2 months, and DREME Math Classroom Observer every 4 months. Most recently, NCTM Central was updated on October 24, 2026 and DREME Math Classroom Observer on October 14, 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.*