# otu.ai vs Chrobox

The clearest difference is update cadence: Chrobox at every 5 days against otu.ai's fortnightly. otu.ai's advantage is iOS requirement (15.1 vs 17.6). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. otu.ai sells 2 in-app purchases, starting at $4.99 per month and Chrobox sells 3 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

otu.ai ships an update fortnightly, Chrobox every 5 days. The most recent releases landed on November 8, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | otu.ai | Chrobox |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 5 days** |
| Monetization | — | Freemium |
| Size | 27 MB | 95 MB |
| Requires iOS | **15.1** | 17.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [opentutorials](https://appshunter.io/developer/1719897055) | [junhyeong kim](https://appshunter.io/developer/1773995986) |

## What reviewers say

### otu.ai

[App page](https://appshunter.io/ios/app/otuai/id6473810282)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $4.99 | per month |
| Yearly Subscription | $44.99 | per year |


### Chrobox

[App page](https://appshunter.io/ios/app/chrobox-time-blocking-planner/id6755880209)

This app helps you focus by blocking distracting applications and using AI to schedule your tasks during your most productive hours. It guides you through brainstorming, prioritizing, timeboxing, and reviewing your day, with features like a routine garden and widgets to keep you on track.

**Highlights:** AI-powered task scheduling, Distracting app blocking, Voice input for brainstorming, Routine garden for habit tracking, Lock Screen and Home Screen widgets, Weekly AI analysis and statistics

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| chrobox_monthly_subscription | $3.99 | per month |
| chrobox_yearly_subscription | $29.99 | per year |
| chrobox_lifetime | $39.99 | one-time |


## Frequently asked questions

### Is otu.ai free?

otu.ai is free to download, with in-app purchases available.

### Is Chrobox free?

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

### Do otu.ai or Chrobox have ads?

Neither otu.ai nor Chrobox shows ads.

### Which is updated more often, otu.ai or Chrobox?

otu.ai ships an update fortnightly, and Chrobox every 5 days. Most recently, otu.ai was updated on November 8, 2026 and Chrobox on November 5, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*