# Netbook vs 90daysChallenge

The clearest difference is ads: 90daysChallenge at none against Netbook's shown. Netbook's advantage is update cadence (every 2 days vs every 3 weeks) and iOS requirement (13.4 vs 16.6). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Netbook ships an update every 2 days, 90daysChallenge every 3 weeks. The most recent releases landed on October 15, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | Netbook | 90daysChallenge |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.0 (1 ratings)](https://appshunter.io/ios/app/90dayschallenge/id6757923468/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 2 days** | Every 3 weeks |
| Monetization | — | Free |
| Size | 30 MB | 10 MB |
| Requires iOS | **13.4** | 16.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [ahmet enes kececi](https://appshunter.io/developer/1772237227) | [HSIN JUI YU](https://appshunter.io/developer/1869655062) |

## What reviewers say

### Netbook

[App page](https://appshunter.io/ios/app/netbook/id6736518993)

**Features:** macOS Compatibility

**In-app purchases:** none


### 90daysChallenge

[App page](https://appshunter.io/ios/app/90dayschallenge/id6757923468)

This app helps you build lasting habits and improve focus through a structured 90-day challenge. It offers dedicated focus modes for deep work and quick sprints, along with daily reminders and motivational quotes to keep you on track.

**Highlights:** 90-Day Challenge Tracker, Deep Focus Mode, Sprint Mode, Daily Reminders, Daily Motivation Quotes

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

**In-app purchases:** none


## Frequently asked questions

### Is Netbook free?

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

### Is 90daysChallenge free?

90daysChallenge is free to download, with no in-app purchases.

### Do Netbook or 90daysChallenge have ads?

Netbook shows ads; 90daysChallenge does not.

### Which is updated more often, Netbook or 90daysChallenge?

Netbook ships an update every 2 days, and 90daysChallenge every 3 weeks. Most recently, Netbook was updated on October 15, 2026 and 90daysChallenge on October 21, 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.*