# Don't Break The Chain! vs Nereus

The clearest difference is in-app purchases: Nereus at none against Don't Break The Chain!'s 4. Nereus also leads on ads (none vs shown). Don't Break The Chain!'s advantage is ratings volume (1.4K vs 1) and iOS requirement (12.0 vs 16.0). On price, rating, update cadence and device support there is nothing between them.

Both are free to download. Don't Break The Chain! sells 4 one-off in-app purchases. Nereus asks for nothing beyond the download.

Nereus holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Don't Break The Chain! has 1.4K ratings behind it against 1, so its average is the more settled of the two.

Don't Break The Chain! ships an update every 3 months, Nereus every 2 months. The most recent releases landed on October 31, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | Don't Break The Chain! | Nereus |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (1.4K ratings)](https://appshunter.io/ios/app/dont-break-the-chain/id313567772/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/nereus-deep-work/id6642642941/reviews)** |
| Number of ratings | **1.4K** | 1 |
| Positive reviews | 83.7% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 3 months | **Every 2 months** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 30 MB | 16 MB |
| Requires iOS | **12.0** | 16.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [ROUGE41](https://appshunter.io/developer/310426702) | [Joseph Balkan](https://appshunter.io/developer/1738281624) |

## What reviewers say

### Don't Break The Chain!

[App page](https://appshunter.io/ios/app/dont-break-the-chain/id313567772)

This app helps you build positive habits and achieve your goals by visually tracking your progress. Mark each day you complete a task towards your objective on a calendar, creating a chain of 'X's. The goal is to never break the chain, fostering consistent effort and motivation.

**Highlights:** Visual goal tracking with a calendar, Daily task commitment marking, Habit formation and bad habit breaking, Clean and intuitive interface, Motivation technique for goal achievement

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Small Tip | $0.99 | one-time |
| Medium Tip | $3.99 | one-time |
| Go Pro! | $5.99 | one-time |
| Large Tip | $11.99 | one-time |

**What reviewers like**

- 👍 Simple and effective
- 🚀 Motivating and helps build habits
- 💡 Visually appealing calendar view
- 🔒 No ads or subscriptions
- 🚀 Easy to use and straightforward

**What reviewers complain about**

- 🔒 Limited to one chain/goal in free version
- 💡 Lack of customization options
- 💡 No ability to track multiple goals
- 🐛 Compatibility issues with iOS 13 updates

**Reported bugs**

- App crashes on launch after iOS 13 update
- Calendar view not properly scaling on larger screens

**Requested features**

- Add ability to track multiple chains/goals
- Implement customization options for colors, fonts, etc.
- Introduce reminders and notifications
- Add option to view progress over longer time periods (years)
- Integrate with other productivity/fitness apps


### Nereus

[App page](https://appshunter.io/ios/app/nereus-deep-work/id6642642941)

This app helps you focus by blocking distracting applications on your iPhone during dedicated work sessions. It syncs with a desktop application to automatically lock down your phone, allowing you to choose which apps to block and stay productive.

**Highlights:** Blocks distracting apps, Deep Work mode, Cross-device sync, QR code pairing, Customizable app blocking

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

**In-app purchases:** none


## Frequently asked questions

### Is Don't Break The Chain! free?

Don't Break The Chain! is free to download, with in-app purchases available.

### Is Nereus free?

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

### Which has better reviews, Don't Break The Chain! or Nereus?

Nereus is rated higher. Don't Break The Chain! averages 4.8 out of 5 from 1.4K ratings, while Nereus averages 5.0 from 1 ratings.

### Do Don't Break The Chain! or Nereus have ads?

Don't Break The Chain! shows ads; Nereus does not.

### Which is updated more often, Don't Break The Chain! or Nereus?

Don't Break The Chain! ships an update every 3 months, and Nereus every 2 months. Most recently, Don't Break The Chain! was updated on October 31, 2026 and Nereus on October 2, 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.*