# EcObjective vs 100mentors.AI

The clearest difference is in-app purchases: 100mentors.AI at none against EcObjective's 2. 100mentors.AI also leads on iOS requirement (12.4 vs 17.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. EcObjective sells 2 in-app purchases, starting at $3.99 per month. 100mentors.AI asks for nothing beyond the download.

EcObjective ships an update every 3 weeks, 100mentors.AI every 2 weeks. The most recent releases landed on September 28, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | EcObjective | 100mentors.AI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (1 ratings)](https://appshunter.io/ios/app/ecobjective-co2-tracker/id1242129400/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 2 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 12 MB | 69 MB |
| Requires iOS | 17.0 | **12.4** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Calogero Cascio](https://appshunter.io/developer/1242129399) | [100 MENTORS SINGLE MEMBER P.C.](https://appshunter.io/developer/1387739709) |

## What reviewers say

### EcObjective

[App page](https://appshunter.io/ios/app/ecobjective-co2-tracker/id1242129400)

Calculate your carbon footprint quickly and receive personalized, science-backed actions to reduce it. This privacy-focused app tracks your environmental impact without requiring an account or selling your data. Get actionable steps and AI coaching to build sustainable habits.

**Highlights:** Carbon footprint calculation, Personalized reduction plans, AI coaching for motivation, Progress tracking, Privacy-focused design, Science-based data

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $3.99 | per month |
| Yearly | $29.99 | per year |


### 100mentors.AI

[App page](https://appshunter.io/ios/app/100mentorsai/id6473743638)

**In-app purchases:** none


## Frequently asked questions

### Is EcObjective free?

EcObjective is free to download, with in-app purchases available.

### Is 100mentors.AI free?

100mentors.AI is free to download, with no in-app purchases.

### Do EcObjective or 100mentors.AI have ads?

Neither EcObjective nor 100mentors.AI shows ads.

### Which is updated more often, EcObjective or 100mentors.AI?

EcObjective ships an update every 3 weeks, and 100mentors.AI every 2 weeks. Most recently, EcObjective was updated on September 28, 2026 and 100mentors.AI on October 8, 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.*