Comparison

M923. vs Soundiary

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

Head to head
About

M923.

Features
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M923. gives you the freedom to create a customized dividing wall in your space, using your smartphone and AR technology. The app enables you to place and design a true-to-scale wall in any space. You can play with our patented profiles and different panels to customize the wall to your liking, and visualize where it would go and what it would look like. Create your wall ยท Build and customize the wall to your needs ยท Play with the different profiles finishes ยท Change the width or height of the wall ยท Fill your wall with different panels in a range of finishes, colors, and materials With just one tap, you can easily add or remove profiles and panels. In the menu you can choose a range of panel finishes such as cork, moss, felt, textiles, or powdercoat colors. With the app, you have the freedom to make changes easily and create a whole new design.

About

Soundiary

This app transforms your daily sounds and body signals into a private journal entry. It analyzes ambient noise, voice, and physiological data to create a summary of your day, focusing on meaning rather than raw audio storage.

Highlights
  • Voice and sound journaling
  • Body signal analysis
  • On-device processing
  • Speaker identification
  • Optional audio saving
  • Voice sensitivity levels
  • Power-saving mode
Features
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Your day deserves to be remembered properly. Soundiary turns a day of sound, heartbeat and body signals into a journal entry written in the quiet of the evening โ€” nothing invented, nothing sentimental. What matters more: unless you ask for it, your voice is never stored. By default, Apple Watch samples the sounds around you, turns them into text, speaker labels and emotional features right on the device, then discards the raw audio. No recording files. No playback. Only meaning is kept. Want to keep some of it? Turn on Save audio and each captured segment is also saved to your iPhone โ€” ready to play, export or delete. The switch ships off, and it stays in your hands. Through the day it listens quietly: sampled sensing, with silence and noise skipped automatically. It hears you from across the room, too โ€” five levels of voice sensitivity, tuned to wherever you are. Worried about battery? Power-saving mode samples just 6 seconds every 10 minutes, while body signals keep coming every 5. A whole night won't disturb your sleep. In the morning, a story that's yours: what you did, who you met, how you felt, and what's still unfinished. Who was speaking is your call: voices are grouped automatically, and you confirm or correct. Everything stays on your device: no account, no cloud sync, no third-party SDK. Not even crash logs. Paid download, complete on arrival: no in-app purchases, no subscriptions, no auto-renewal. Requires iOS 18+ and Apple Watch Series 6 or later (including SE 2nd gen and Ultra).

Screenshots

M923.4 screens
Soundiary4 screens

Verdict

The call

The clearest difference is price: M923. at Free against Soundiary's $0.99. M923. also leads on iOS requirement (11.0 vs 18.0). Soundiary's advantage is update cadence (every 3 days vs every 4 months). On ads, in-app purchases and device support 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

M923. is free to download; Soundiary costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

M923. ships an update every 4 months, Soundiary every 3 days. Both last shipped on October 29, 2026.

Scorecard3 real differences ยท 5 level
M923. versus Soundiary: the parameters behind the verdict, then further details
ParameterM923.Soundiary
PriceFree โ€” better$0.99
Positive reviewsโ€”100.0% of reviews
Update frequencyEvery 4 monthsEvery 3 days โ€” better
AdsNoNo
In-app purchasesNoNo
Monetizationโ€”Paid
DevicesiPhone, iPad, iPod โ€” betteriPhone, Apple Watch
Requires iOS11.0 โ€” better18.0
Further details โ€” not scored
Size306 MB2 MB
Age rating4+4+
DeveloperTotal Reality B.V.็ฃŠ ่พ›

In-app purchases

None

M923.

No in-app purchases

None

Soundiary

No in-app purchases

Questions

Is M923. free?
M923. is free to download, with no in-app purchases.
Is Soundiary free?
Soundiary costs $0.99, with no in-app purchases.
Do M923. or Soundiary have ads?
Neither M923. nor Soundiary shows ads.
Which is updated more often, M923. or Soundiary?
M923. ships an update every 4 months, and Soundiary every 3 days. Most recently, M923. was updated on October 29, 2026 and Soundiary on October 29, 2026.

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