Comparison

SMD vs SubVox

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

Head to head
About

SMD

This tool for Apple Watch detects magnetic fields, offering detailed sensor views and customizable notifications. It provides polarity-specific haptic feedback and is recommended for Series 6 and later models for optimal performance.

Highlights
  • Magnetic field component monitoring (X, Y, Z)
  • Customizable sensitivity
  • Notification interval settings
  • Significant change detection alerts
  • Polarity-specific haptic feedback
  • Analog Watch Mode for optimal performance
Features
Read full description

SMD is a watchOS app that turns Apple Watch into a magnetic detector and provides haptic alerts for nearby magnetic field changes. You can switch between the analog clock screen and the Settings screen with a swipe. SMD offers two operating modes: Manual Mode and Motion Mode. In Manual Mode, detection starts and stops with a tap. In Motion Mode, raising the wrist starts the sensor, and briefly holding still completes the set process and makes the app ready to use. Lowering the wrist stops sensing. Motion Mode also supports tap-based OFF and re-set actions. Detection and alerts become active only after baseline acquisition is complete. Sensitivity can be adjusted from the Settings screen using the Digital Crown. The Settings screen shows ON / OFF status, X / Y / Z values, mode switching, sensitivity, and version information. When magnetic reference is inactive, X / Y / Z values are shown as -.--. Key Features - Magnetic detector functionality using Apple Watch - Haptic alerts - Manual Mode and Motion Mode - Sensitivity adjustment with the Digital Crown - X / Y / Z value display - Automatic polarity detection - Stable single-trigger alert behavior Important Notes - Do not use magnetic watch bands - Strong magnets may temporarily affect sensor readings - Apple Watch Series 10 or later is recommended

About

SubVox

This tool allows for hands-free content extraction and action triggering using voice commands. It processes audio locally by default, with optional cloud AI integration. Privacy is a core focus, with no storage or collection of user audio or text data.

Highlights
  • Voice-triggered context extraction
  • Custom start and stop phrases
  • On-device speech processing
  • Optional conversational AI
  • Background mode
  • Third-party integrations
  • watchOS companion app
Features
Read full description

SubVox is a voice-activated content extraction tool with optional conversational AI features, designed for creators, performers, productivity users, and anyone who needs fast, hands-free action triggers. Speak your start and stop trigger phrases, and SubVox interprets the intent — then sends it to the third-party app or integration you choose. All audio and speech recognition is performed locally on your device by default. You may optionally choose to turn on Cloud Speech AI, which additionally can use AI provider cloud models for speech to text. SubVox does not store, track, or collect audio, transcripts, or extracted text. Features • Voice-triggered context extraction • Custom start and stop phrases • On-device speech processing • Optional conversational AI using user-provided AI provider credentials • Optional background mode when the screen is off • Third-party integrations including MysterSmith, Inject, and more • watchOS companion app • Secure storage of integration and AI credentials in Keychain Privacy First SubVox does not store audio, transcripts, or extracted text. If you choose to enable conversational AI, text is sent directly from your device to the AI provider you select using your own credentials. SubVox does not receive, store, or process this data on its own servers. Your data only leaves your device when you explicitly choose to send it and only to services you authorize. For Entertainment & Personal Utility SubVox is intended for entertainment and personal utility. It is not designed for professional, legal, medical, or safety-critical use.

Screenshots

SubVox3 screens

Verdict

The call

The clearest difference is review sentiment: SubVox at 100% against SMD's 50%. SubVox also leads on price (Free vs $19.99) and iOS requirement (18.0 vs 26.0). On update cadence, ads, 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

CostPrice · In-app purchases · Ads · Monetization

SubVox is free to download; SMD costs $19.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

SMD ships an update weekly, SubVox every 2 weeks. The most recent releases landed on September 10, 2026 and September 5, 2026 respectively.

Scorecard4 real differences · 6 level
SMD versus SubVox: the parameters behind the verdict, then further details
ParameterSMDSubVox
Price$19.99Free — better
Rating—5.0 (1 ratings) — better
Positive reviews50.0% of reviews100.0% of reviews — better
Number of ratings—1 — better
Update frequencyWeekly — betterEvery 2 weeks
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree with in-app purchases — better
DevicesiPhone, Apple WatchiPhone, iPad, Apple Watch — better
Requires iOS26.018.0 — better
Further details — not scored
Size1 MB59 MB
Age rating4+4+
DeveloperYOSHINOBU HONGOChristopher Canfield

Customer experience

SMD

Written reviews6 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

SubVox

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

SMD

No in-app purchases

None

SubVox

No in-app purchases

Questions

Is SMD free?
SMD costs $19.99, with no in-app purchases.
Is SubVox free?
SubVox is free to download, with no in-app purchases.
Do SMD or SubVox have ads?
Neither SMD nor SubVox shows ads.
Which is updated more often, SMD or SubVox?
SMD ships an update weekly, and SubVox every 2 weeks. Most recently, SMD was updated on September 10, 2026 and SubVox on September 5, 2026.

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