# EarthProject vs CENTA® for Teachers

The clearest difference is rating: CENTA® for Teachers at 4.7 against EarthProject's 3.4. CENTA® for Teachers also leads on update cadence (every 8 days vs monthly) and review sentiment (75% vs 60%). EarthProject's advantage is in-app purchases (none vs 13). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. CENTA® for Teachers sells 13 in-app purchases, starting at $12.99 per year. EarthProject asks for nothing beyond the download.

CENTA® for Teachers holds the better App Store score, 4.7 against 3.4. Both are backed by a comparable volume of ratings — 5 and 17 respectively. Written reviews point the same way: 60% of EarthProject's written reviews are positive against 75% of CENTA® for Teachers's.

EarthProject ships an update monthly, CENTA® for Teachers every 8 days. The most recent releases landed on October 16, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | EarthProject | CENTA® for Teachers |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.4 (5 ratings)](https://appshunter.io/ios/app/earthproject/id1580109940/reviews) | **[4.7 (17 ratings)](https://appshunter.io/ios/app/centa-for-teachers/id6450893643/reviews)** |
| Number of ratings | 5 | **17** |
| Positive reviews | 60.0% of reviews | **75.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 8 days** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 70 MB | 143 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [TAKE ACTION GLOBAL Inc](https://appshunter.io/developer/1580109942) | [CENTA](https://appshunter.io/developer/1695552429) |

## What reviewers say

### EarthProject

[App page](https://appshunter.io/ios/app/earthproject/id1580109940)

Learn and get motivated to reduce your carbon and plastic footprint. This educational app provides tools and encouragement for sustainable living.

**Highlights:** Learn waste reduction techniques, Motivation for sustainable living, Carbon footprint tracking, Plastic waste reduction guidance, Educational content

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

**In-app purchases:** none


### CENTA® for Teachers

[App page](https://appshunter.io/ios/app/centa-for-teachers/id6450893643)

Enhance your teaching career with professional development, career opportunities, and a global community. Access over 1000 learning resources, get certified, and track your progress. Connect with educators worldwide.

**Highlights:** Teaching competency certification and assessment, Career opportunities and rewards, 1000+ curated learning resources, Global teacher community, Personalized learning recommendations, Progress tracking

**Features:** macOS Compatibility

**In-app purchases (13)**

| Purchase | Price | Billing |
| --- | --- | --- |
| CENTA Plus Special Price | $12.99 | per year |
| CENTA Plus | $14.99 | per year |
| CENTA AI Tier 3 | $0.99 | one-time |
| CENTA AI Tier 2 | $1.99 | one-time |
| Subscription Product Tier 3 | $4.99 | one-time |
| CENTA AI Tier 1 | $4.99 | one-time |
| Subscription Product Tier 4 | $5.99 | one-time |
| Subscription Product Tier 5 | $7.99 | one-time |
| Subscription Product Tier 6 | $8.99 | one-time |
| CENTA AI Tier 4 | $9.99 | one-time |
| Subscription Product Tier 12 | $9.99 | one-time |
| Subscription Product Tier 14 | $12.99 | one-time |
| Learning Product Tier 14 | $12.99 | one-time |


## Frequently asked questions

### Is EarthProject free?

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

### Is CENTA® for Teachers free?

CENTA® for Teachers is free to download, with in-app purchases available.

### Which has better reviews, EarthProject or CENTA® for Teachers?

CENTA® for Teachers is rated higher. EarthProject averages 3.4 out of 5 from 5 ratings, while CENTA® for Teachers averages 4.7 from 17 ratings.

### Do EarthProject or CENTA® for Teachers have ads?

Neither EarthProject nor CENTA® for Teachers shows ads.

### Which is updated more often, EarthProject or CENTA® for Teachers?

EarthProject ships an update monthly, and CENTA® for Teachers every 8 days. Most recently, EarthProject was updated on October 16, 2026 and CENTA® for Teachers on October 25, 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.*