# Nudj — Join challenges, save carbon.

> Join challenges, save carbon. (iPhone/iPad app by Nudj Limited.)

- Source: https://appshunter.io/ios/app/nudj/id1580788306 (this page in markdown: same URL + `.md`)
- Developer: [Nudj Limited](https://appshunter.io/developer/1580788308)
- Category: Lifestyle, Education
- Price: Free
- Age rating: 4+
- Requires: iOS 12.1 · 24 MB
- Languages: English
- Released: 2022-03-02
- Data updated: 2026-05-19
- User reviews in markdown: https://appshunter.io/ios/app/nudj/id1580788306/reviews.md

## What is Nudj?

Making sustainable and healthy choices that are better for the environment and your wellbeing has never been so easy.

Nudj helps you to live sustainably in the long term, by making small changes that have a big impact over time, all for free. 

Our mission is to achieve a one tonne carbon reduction for every adult in the UK by 2025, by empowering people to make simple, sustainable changes to their habits.

Challenge yourself, or your friends, to achieve manageable goals that help the environment and your wellbeing. 

- Choose from over 50 challenges that fit around your lifestyle and routine.
- You can choose how many challenges you complete and how often. Even the smallest action will make a positive change. 
- All of our challenges include facts and tips to help you make informed choices about your activities and wellbeing.
- Connect with friends, family and the Nudj community to see the collective progress we’re making.
- Build up your sustainable habits over time until they become part of your everyday life.

Join the Nudj community today and help us make a difference, one small Nudj at a time.


## Version history (last 2 releases)

### 2.6 — 2023-03-31

Reuse Your Cup Circular&Co. Sponsored Challenge

### 2.5 — 2022-11-15

- New screenshots

## Apps similar to Nudj

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Earth Rewards Carbon Tracker](https://appshunter.io/ios/app/earth-rewards-carbon-tracker/id1464760249) | 3.7 (3) | Free | Lifestyle |
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| [susGain](https://appshunter.io/ios/app/susgain/id1664494870) | 5.0 (10) | Free | Lifestyle |
| [Myplan8 \| Climate Action](https://appshunter.io/ios/app/myplan8-climate-action/id6444596102) | — | Free | Lifestyle |

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-05-19.*