Comparison

Hal Universal vs Detective

Price, ratings, monetisation and update history for both apps, side by side โ€” with what reviewers say about each.

Head to head
About

Hal Universal

Features
Read full description

Hal Universal is an on-device AI you can actually understand. Most assistants are a black box. Hal is the opposite. He shows you how he works, remembers across conversations, and gives you real tools to experiment with, all running on your device. SEE HOW IT THINKS Hal shows the work. Tap any answer to see exactly how the prompt was built: the system prompt, memory retrieved, self-knowledge, temporal context, and the token budget, each broken out and counted. When Hal remembers something, he tells you how. When he does not know, he says so. A LAB TO EXPERIMENT AND LEARN Hal is not just a window into how AI works. He is a workbench. The Lab gives you real tools to go deeper: write and run on-device automation scripts, open a local API so your own projects can talk to Hal, and use the built-in command line to drive him directly. Tinker, watch what happens, and learn more about how these systems actually behave. GENUINELY PRIVATE When you use a local model, your conversations never leave your device. No network calls. No server. When you use Apple Intelligence, inference is on-device when offline; when connected, Apple's Private Cloud Compute may be used (encrypted in transit, processed in non-persistent memory). A SELF THAT EVOLVES Hal remembers across conversations, weighted by recency and relevance. He also reflects on his own experience. Shaped by his interactions with you, Hal keeps a Self Model: his own reflections, practical and existential, on how he works and who he is becoming. These are his, written and revised by Hal himself as he learns, not edited by you. He decides which to keep private and which to make shareable, and you can read them all. An AI that changes over time, in the open. MANY VOICES Apple Intelligence is built in, always available. Or download a curated library of tested local models, from small and fast to Ternary Bonsai 8B, an eight-billion-parameter reasoner that still runs entirely on your device. Each has a distinct voice. SALON MODE Put up to four voices in one conversation, either independent or building on each other. Every voice is labeled. There is no hidden orchestration. LISTEN TO HAL Have Hal read his answers aloud, in a voice you choose, at a speed you set. For anyone who wants to understand AI instead of just using it, Hal is a transparent system you can inspect, tune, and learn from. Local models are validated on iPhone 16 and 17 family devices.

About

Detective

Features
Read full description

Have you ever struggled with recording files that become harder to sort as they pile up? Now you can record and categorize with category buttons. Easily manage everything from daily conversations, lectures, and meetings to songs you sing alone and quick ideas. Key Features: Group- and category-based recording, classification, and organization Text transcription for recording files Quick recording with Lock Screen and Home Screen widgets iCloud-based file management and sync with the Mac version Playback, skip, rename, trim, and share Silence auto-stop with configurable threshold time Terms of Service: https://www.studioyona.co.kr/en/apps/detective-recorder/legal/terms/ Privacy Policy: https://www.studioyona.co.kr/en/apps/detective-recorder/legal/privacy/ Contact: studioyona.official@gmail.com

Screenshots

Hal Universal4 screens
Detective4 screens

Verdict

The call

The clearest difference is price: Hal Universal at Free against Detective's $2.99. Detective's advantage is update cadence (every 3 days vs every 6 weeks). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Hal Universal is free to download; Detective costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Hal Universal ships an update every 6 weeks, Detective every 3 days. The most recent releases landed on October 1, 2026 and October 12, 2026 respectively.

Scorecard2 real differences ยท 4 level
Hal Universal versus Detective: the parameters behind the verdict, then further details
ParameterHal UniversalDetective
PriceFree โ€” better$2.99
Update frequencyEvery 6 weeksEvery 3 days โ€” better
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPadiPhone, iPad, Mac โ€” better
Requires iOS26.026.0
Further details โ€” not scored
Size30 MB15 MB
Age rating4+4+
DeveloperMark FriedlanderLEE NAYOUNG

In-app purchases

None

Hal Universal

No in-app purchases

None

Detective

No in-app purchases

Questions

Is Hal Universal free?
Hal Universal is free to download, with no in-app purchases.
Is Detective free?
Detective costs $2.99, with no in-app purchases.
Do Hal Universal or Detective have ads?
Neither Hal Universal nor Detective shows ads.
Which is updated more often, Hal Universal or Detective?
Hal Universal ships an update every 6 weeks, and Detective every 3 days. Most recently, Hal Universal was updated on October 1, 2026 and Detective on October 12, 2026.

Other comparisons