Comparison

microCavity vs Wittgenstein

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

Head to head
About

microCavity

Control a miniature sensing system wirelessly using your iPhone. This app allows you to view live data, make measurements, and capture screenshots from a photonic sensor. It integrates complex equipment into a phone-sized system for remote operation.

Highlights
  • Wireless control of sensing systems
  • View live transmission spectrum
  • Perform measurements
  • Capture instrument screenshots
  • Integrates bulky equipment into embedded system
Features
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Microcavity is used to control the whispering-gallery-mode (WGM) microresonators based miniature sensing system wirelessly. As the photonic sensor of this system, WGM resonators have features of ultra-high quality (Q) factors and small mode volumes, which have found broad applications in photonics, such as cavity quantum electrodynamics, optomechanics, bio/chemical sensors , nonlinear optics, microlasers and non-Hermitian optics. In order to explore the potential applications in Internet of things for WGM resonators, a wireless WGM sensing system is developed, which not only integrates bulky equipment into a phone-sized embedded system, but also achieves the functionality of remote control by iPhone. This app enables you to view live transmission spectrum of WGM sensor, make measurements, and capture instruments screenshots from your iPhone.

About

Wittgenstein

Features
Read full description

A slow, careful encounter with Wittgenstein's Tractatus Logico-Philosophicus. Each proposition appears as a fill-in-the-blank — one word missing, two options to choose from. You read carefully, weigh each word, and feel why Wittgenstein chose this one. The Tractatus, from "The world is everything that is the case" to the closing silence. Faithful to the Ogden translation. Five propositions per day are free. A one-time purchase unlocks the book — yours forever. No ads. No tracking. Fully offline.

Screenshots

microCavity2 screens
Wittgenstein2 screens

Verdict

The call

The clearest difference is in-app purchases: microCavity at none against Wittgenstein's 1. microCavity also leads on iOS requirement (15.0 vs 17.6). Wittgenstein's advantage is update cadence (every 8 months vs every 34 months). On price, ads 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

Both are free to download. Wittgenstein sells 1 one-off in-app purchase. microCavity asks for nothing beyond the download.

UpkeepUpdate frequency

microCavity ships an update every 34 months, Wittgenstein every 8 months. The most recent releases landed on September 29, 2026 and October 10, 2026 respectively.

Scorecard3 real differences · 6 level
microCavity versus Wittgenstein: the parameters behind the verdict, then further details
ParametermicroCavityWittgenstein
PriceFreeFree
Rating5.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyEvery 34 monthsEvery 8 months — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better17.6
Further details — not scored
Size7 MB3 MB
Age rating4+4+
DeveloperWashington University in St. LouisSungjun Kim

In-app purchases

None

microCavity

No in-app purchases

1 purchases

Wittgenstein

One-time1
  • Unlock All Sentences$4.99

Questions

Is microCavity free?
microCavity is free to download, with no in-app purchases.
Is Wittgenstein free?
Wittgenstein is free to download, with in-app purchases available.
Do microCavity or Wittgenstein have ads?
Neither microCavity nor Wittgenstein shows ads.
Which is updated more often, microCavity or Wittgenstein?
microCavity ships an update every 34 months, and Wittgenstein every 8 months. Most recently, microCavity was updated on September 29, 2026 and Wittgenstein on October 10, 2026.

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