# Mango Languages vs IndoorCO2Map Data Collector

The clearest difference is in-app purchases: IndoorCO2Map Data Collector at none against Mango Languages's 4. IndoorCO2Map Data Collector also leads on ads (none vs shown) and review sentiment (100% vs 77%). Mango Languages's advantage is update cadence (fortnightly vs every 3 months) and ratings volume (44K vs 2). On price, rating, device support and iOS requirement there is nothing between them.

Both are free to download. Mango Languages sells 4 in-app purchases, starting at $13.99 per month. IndoorCO2Map Data Collector asks for nothing beyond the download.

IndoorCO2Map Data Collector holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Mango Languages has 44K ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 77% of Mango Languages's written reviews are positive against 100% of IndoorCO2Map Data Collector's.

Mango Languages ships an update fortnightly, IndoorCO2Map Data Collector every 3 months. The most recent releases landed on October 23, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | Mango Languages | IndoorCO2Map Data Collector |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (44K ratings)](https://appshunter.io/ios/app/mango-languages-learning/id443516516/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/indoorco2map-data-collector/id6504560820/reviews)** |
| Number of ratings | **44K** | 2 |
| Positive reviews | 77.4% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Fortnightly** | Every 3 months |
| Monetization | Freemium | **Free** |
| Best chart rank | **#176** | — |
| Size | 85 MB | 101 MB |
| Requires iOS | 15.5 | **15.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Creative Empire, LLC](https://appshunter.io/developer/443516519) | [Aurel Wuensch](https://appshunter.io/developer/1752859912) |

## What reviewers say

### Mango Languages

[App page](https://appshunter.io/ios/app/mango-languages-learning/id443516516)

**Currently charting:** #176 Top Grossing · Education, #200 Top Free · Education (US App Store)

Learn to speak foreign languages with conversational lessons focused on real language, culture, and progress. Features native speaker recordings, pronunciation tools, and personalized reviews. Download lessons for offline access and enjoy a distraction-free learning experience.

**Highlights:** Conversational lessons, 70+ languages, Native speaker recordings, Pronunciation comparison tool, Personalized reviews, Offline lesson access, No ads

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Individual Plan (Monthly) | $13.99 | per month |
| Family Plan (Monthly) | $19.99 | per month |
| Individual Plan (Yearly) | $119.99 | per year |
| Family Plan (Yearly) | $149.99 | per year |

**What reviewers like**

- 🚀 Effective language learning
- 👍 Useful features (pronunciation, review cards, etc.)
- 🌍 Wide variety of languages
- 💰 Free through libraries
- 👍 Engaging and interactive lessons

**What reviewers complain about**

- 🐛 App crashes and login issues
- 💰 Expensive subscription
- 🔍 Limited content for some languages
- 🔀 Disruptive changes to lesson structure
- 📖 Lack of grammar explanations

**Reported bugs**

- App crashes when accessing flashcards
- Downloading issues when traveling abroad
- Inconsistent behavior when switching between lessons

**Requested features**

- Dark mode option
- More grammar and writing support
- Improved vocabulary tools
- Customizable lesson structure
- Offline access improvements


### IndoorCO2Map Data Collector

[App page](https://appshunter.io/ios/app/indoorco2map-data-collector/id6504560820)

Contribute to a citizen science project by collecting indoor CO2 concentration data in public buildings. Use a supported CO2 sensor and this application to build a comprehensive dataset for analysis.

**Highlights:** Collect indoor CO2 concentration data, Supports Aranet, Airvalent, AirSpot, Inkbird-IAMT1 sensors, Contribute to citizen science project, Builds comprehensive indoor CO2 dataset, Data collection for non-residential buildings

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Mango Languages free?

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

### Is IndoorCO2Map Data Collector free?

IndoorCO2Map Data Collector is free to download, with no in-app purchases.

### Which has better reviews, Mango Languages or IndoorCO2Map Data Collector?

IndoorCO2Map Data Collector is rated higher. Mango Languages averages 4.8 out of 5 from 44K ratings, while IndoorCO2Map Data Collector averages 5.0 from 2 ratings.

### Do Mango Languages or IndoorCO2Map Data Collector have ads?

Mango Languages shows ads; IndoorCO2Map Data Collector does not.

### Which is updated more often, Mango Languages or IndoorCO2Map Data Collector?

Mango Languages ships an update fortnightly, and IndoorCO2Map Data Collector every 3 months. Most recently, Mango Languages was updated on October 23, 2026 and IndoorCO2Map Data Collector on October 19, 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.*