# Chaos Control™ vs Billi

The clearest difference is in-app purchases: Billi at none against Chaos Control™'s 9. Chaos Control™'s advantage is device support (4 vs 2) and iOS requirement (11.0 vs 13.0). On price, update cadence and ads there is nothing between them.

Both are free to download. Chaos Control™ sells 9 in-app purchases, starting at $3.99 per month. Billi asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on October 23, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | Chaos Control™ | Billi |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (488 ratings)](https://appshunter.io/ios/app/chaos-control-gtd-task-list/id591766437/reviews)** | — |
| Number of ratings | **488** | — |
| Positive reviews | 72.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 318 MB | 15 MB |
| Requires iOS | **11.0** | 13.0 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Tarasov Mobile](https://appshunter.io/developer/547656503) | [Rares-Constantin Popa](https://appshunter.io/developer/1496013459) |

## What reviewers say

### Chaos Control™

[App page](https://appshunter.io/ios/app/chaos-control-gtd-task-list/id591766437)

This app helps you manage goals, to-do lists, and tasks for both personal and professional life. It's based on the GTD methodology to prioritize outcomes and organize projects, tasks, and ideas efficiently. Seamless syncing across devices ensures your plans are always accessible.

**Highlights:** Goal and project management, GTD-inspired contexts, Daily planning, Chaos Box inbox, Cross-platform sync, Recurring tasks

**Features:** macOS Compatibility, Siri integration, Apple Watch app

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Subscription: 1 Month | $3.99 | per month |
| Premium for 1 month | $6.99 | per month |
| Premium Subscription: 1 Year | $29.00 | per year |
| Premium Subscription: 1 Year | $29.99 | per year |
| "Level Up" e-book | $2.99 | one-time |
| Premium Universal - Tier B | $10.99 | one-time |
| Chaos Control Premium | $18.99 | one-time |
| Premium Universal - Tier C | $20.99 | one-time |
| Premium Universal - Tier A | $79.99 | one-time |

**What reviewers like**

- 👍 Intuitive and easy to use
- 🚀 Streamlined organization
- 💡 Helpful Chaos Box feature
- 🚀 Seamless cross-device sync
- 👍 Clean and attractive interface

**What reviewers complain about**

- 🐛 Crashes and bugs
- 🔒 Sync and login issues
- 💰 Unexpected costs for full features
- 🤔 Lacks some basic GTD functionality

**Reported bugs**

- Tasks disappearing
- Sync failures between devices
- Frequent crashes
- Login problems

**Requested features**

- Calendar integration
- Subtasks and nested projects
- Ability to manually sort tasks
- More customization options
- Email task creation


### Billi

[App page](https://appshunter.io/ios/app/billi/id1626730625)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Chaos Control™ free?

Chaos Control™ is free to download, with in-app purchases available.

### Is Billi free?

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

### Do Chaos Control™ or Billi have ads?

Neither Chaos Control™ nor Billi shows ads.

### Which is updated more often, Chaos Control™ or Billi?

Chaos Control™ ships an update every 3 weeks, and Billi every 3 weeks. Most recently, Chaos Control™ was updated on October 23, 2026 and Billi on October 27, 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.*