HAL vs DHD
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
HAL
Engage in voice-activated conversations with an AI assistant that mimics sci-fi characters. Enjoy jokes, small talk, and get advice for various situations. Future updates aim to improve memory and accuracy.
- Voice input for immediate conversation
- AI-powered jokes and small talk
- Assistance with research and advice
- Sci-fi movie-like AI interaction
- Free to use
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"HAL: Voice AI Assistant" is a free AI chat application that utilizes OpenAI's Chat API, allowing you to converse with an AI like those in sci-fi movies right on your smartphone. Easily usable with voice input alone, and it's free! Upon opening the app, voice input starts immediately, allowing you to casually ask questions or engage in conversation. The app's greatest charm is the AI's ability to tell jokes and have enjoyable small talk. Providing fun moments filled with laughter, just like conversations with friends and family. Moreover, it excels in various situations, such as research, love advice, or casual chats when bored. The current app has weaknesses like being unable to remember interactions or the AI conveying incorrect information. However, upcoming updates aim to resolve these issues. Experience a sci-fi movie-like future in the palm of your hand with "HAL: Voice AI Assistant" Look forward to its further evolution as a fun and convenient app.
DHD
This app simulates a Stargate Dial Home Device, allowing you to make phone calls to your contacts by entering a 7-glyph address. It features authentic sound effects and haptic feedback for a unique calling experience.
- Dial Home Device interface
- 7-chevron locking sequence
- Authentic sound effects
- Haptic feedback
- Cartouche address book
- Swipe to re-dial
- Swipe to delete entries
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Greetings, Tau'ri! This application simulates the Stargate Dial Home Device (DHD). Instead of establishing wormholes to distant planets, this DHD connects you to your contacts via the primitive Tau'ri communication network - also known as "phone calls." HOW IT WORKS Dial a 7-glyph address on the DHD interface. Each glyph you tap locks a chevron, accompanied by authentic sound effects and haptic feedback. Once all seven chevrons are locked, press the central activation dome to engage. If the address matches a saved contact, the call connects. If the address is unknown, you can map it to a contact from your address book for future dialing. FEATURES - Dial Home Device interface with concentric glyph rings and a central activation dome - 7-chevron locking sequence with sound effects and haptic feedback - Cartouche address book: save, view, and manage your glyph-to-contact mappings - Swipe to re-dial saved addresses with automated glyph entry - Swipe to delete entries you no longer need Whether you're a fan of the Stargate franchise or just want a unique way to call your friends, the Dial Home Device brings a bit of sci-fi fun to your day. Stargate and all related marks, logos, and concepts are trademarks of Amazon MGM Studios. This application is not affiliated with, endorsed by, or sponsored by Amazon MGM Studios.
Screenshots
Verdict
The clearest difference is price: HAL at Free against DHD's $0.99. HAL also leads on rating (3.5 vs 3.0) and ratings volume (11 vs 1). DHD's advantage is ads (none vs shown) and update cadence (every 3 weeks vs every 2 months). On in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
HAL is free to download; DHD costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
HAL holds the better App Store score, 3.5 against 3.0. That said, the two scores are not equally well evidenced: HAL has 11 ratings behind it against 1, so its average is the more settled of the two.
HAL ships an update every 2 months, DHD every 3 weeks. The most recent releases landed on October 22, 2026 and October 24, 2026 respectively.
| Parameter | HAL | DHD |
|---|---|---|
| Price | Free — better | $0.99 |
| Rating | 3.5 (11 ratings) — better | 3.0 (1 ratings) |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 11 — better | 1 |
| Update frequency | Every 2 months | Every 3 weeks — better |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | Ad-supported — better | Paid |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 11.0 — better | 15.1 |
| Further details — not scored | ||
| Size | 35 MB | 34 MB |
| Age rating | 17+ | 4+ |
| Developer | yu nakamura | Jarkko Asgard |
Customer experience
HAL
DHD
In-app purchases
HAL
No in-app purchases
DHD
No in-app purchases









