# 100 Days Tracker vs Dozee Nucleus

The clearest difference is in-app purchases: Dozee Nucleus at none against 100 Days Tracker's 1. Dozee Nucleus also leads on update cadence (weekly vs every 6 weeks) and iOS requirement (15.1 vs 17.6). On price, ads and device support there is nothing between them.

Both are free to download. 100 Days Tracker sells 1 one-off in-app purchase. Dozee Nucleus asks for nothing beyond the download.

100 Days Tracker ships an update every 6 weeks, Dozee Nucleus weekly. The most recent releases landed on October 10, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | 100 Days Tracker | Dozee Nucleus |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Weekly** |
| Monetization | Free | — |
| Size | 11 MB | 20 MB |
| Requires iOS | 17.6 | **15.1** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Chad Goodyear](https://appshunter.io/developer/1448496611) | [TURTLE SHELL TECHNOLOGIES PRIVATE LIMITED](https://appshunter.io/developer/1328282637) |

## What reviewers say

### 100 Days Tracker

[App page](https://appshunter.io/ios/app/100-days-tracker/id6470750665)

This app helps you build lasting habits by tracking your daily progress on up to 100-day challenges. Customize your goals with themes and layouts, and share your achievements. Widgets offer at-a-glance progress updates.

**Highlights:** Track multiple 100-day challenges, Home screen widgets for progress, Customizable color themes, Grid and overview layouts, Share progress snapshots

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Lifetime | $6.99 | one-time |


### Dozee Nucleus

[App page](https://appshunter.io/ios/app/dozee-nucleus/id6752010254)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 100 Days Tracker free?

100 Days Tracker is free to download, with in-app purchases available.

### Is Dozee Nucleus free?

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

### Do 100 Days Tracker or Dozee Nucleus have ads?

Neither 100 Days Tracker nor Dozee Nucleus shows ads.

### Which is updated more often, 100 Days Tracker or Dozee Nucleus?

100 Days Tracker ships an update every 6 weeks, and Dozee Nucleus weekly. Most recently, 100 Days Tracker was updated on October 10, 2026 and Dozee Nucleus on October 24, 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.*