# HAL 9000 vs Bit Trainer

The clearest difference is ads: HAL 9000 at none against Bit Trainer's shown. HAL 9000 also leads on monetization model (free vs ad-supported) and iOS requirement (11.0 vs 15.1). Bit Trainer's advantage is update cadence (every 9 days vs every 36 months). 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.

HAL 9000 ships an update every 36 months, Bit Trainer every 9 days. Both last shipped on November 3, 2026.

## The numbers

| Metric | HAL 9000 | Bit Trainer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (2 ratings)](https://appshunter.io/ios/app/hal-9000/id1518486203/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 36 months | **Every 9 days** |
| Monetization | **Free** | Ad-supported |
| Size | 26 MB | 28 MB |
| Requires iOS | **11.0** | 15.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Vladimir Djokic](https://appshunter.io/developer/1483350231) | [Sapientia Data Limited](https://appshunter.io/developer/1630711968) |

## What reviewers say

### HAL 9000

[App page](https://appshunter.io/ios/app/hal-9000/id1518486203)

Experience classic chess with advanced 3D graphics and an AI opponent. This hobby project offers a virtual chess set for players to test their skills. More features are planned for future updates.

**Highlights:** Advanced 3D graphics, Virtual chess set interaction, Play against AI opponent, Classic chess gameplay

**Features:** macOS Compatibility

**In-app purchases:** none


### Bit Trainer

[App page](https://appshunter.io/ios/app/bit-trainer/id1630711966)

Master binary, decimal, and hexadecimal number systems through engaging conversion challenges. This game offers tutorials and practice exercises for beginners and those looking to enhance their mental math skills with a unique approach.

**Highlights:** Binary, Decimal, Hexadecimal conversion, Tutorials on number systems, Practice exercises, Mental calculation improvement, Alternative to traditional math games

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is HAL 9000 free?

HAL 9000 is free to download, with no in-app purchases.

### Is Bit Trainer free?

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

### Do HAL 9000 or Bit Trainer have ads?

Bit Trainer shows ads; HAL 9000 does not.

### Which is updated more often, HAL 9000 or Bit Trainer?

HAL 9000 ships an update every 36 months, and Bit Trainer every 9 days. Most recently, HAL 9000 was updated on November 3, 2026 and Bit Trainer on November 3, 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.*