Comparison

VOSIS vs PhonoPaper

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

Head to head
About

VOSIS

This app transforms image data into sound, allowing for unique musical compositions and experimental sound design. It offers control over pitch, timbre, and envelopes to create shape-timbre relationships from visual input.

Highlights
  • Image sonification
  • Visual music composition
  • Experimental sound design
  • Pixel luminance audification
  • Shape-timbre relationships
  • Adjustable pitch and timbre
  • ADSR envelope control
Read full description

VOSIS is a synthesizer combining audification of greyscale pixel data with several image filters. It is a tool for image sonification, visual music composition, and experimental sound design. The audification of pixel luminance values creates shape-timbre relationships. Pixel scan rate is controlled in terms of note interval, octave, and scale to give varying pitch between image regions. The ADSR envelope allows one to play images as a non-linear sequence of pitches with varying wavetable/timbre. For more features including presets and unlimited recording see VOSIS Pro. Visit vosis.app for sound example, demo videos, and user guide!

About

PhonoPaper

This app decodes images containing encoded sound, allowing you to play back audio embedded within visual patterns. You can also record your own sounds and convert them into these unique visual codes. It's designed for creative audio messaging and artistic expression.

Highlights
  • Decode images with encoded sound
  • Create sound codes from recordings
  • Offline decoding capability
  • Analogue code for distortion resilience
  • Real-time, hand-controlled playback
  • Draw codes for unique sounds
Features
Read full description

PhonoPaper is a camera app for playing pictures with encoded sound (PhonoPaper-codes). With this app, you can also create your own codes: 10 seconds of sound can be recorded from a microphone and converted into an image. [ Key features ] * PhonoPaper does not require access to the network for decoding; * PhonoPaper code is analogue, so it is not so sensitive to different types of the image distortion (bad camera, dark picture, wrinkled paper, etc.); at least you will hear the "silhouette" of the original sound; * code can be played in real-time with hand-controlled speed and direction; * code can be drawn by hand to get some unusual sounds. [ Examples of usage ] * voice messages (or pieces of music) on t-shirts, billboards, posters, postcards, goods; * audio labels for phonorecords; * audio examples in books; * secret messages; * art-experiments. [ How to use ] Launch the app, point the camera at the code (tap on the screen to focus if necessary) and smoothly scan the picture from left to right. The code should be parallel to the frame - try to keep the camera level. The black code markers (top and bottom) should fall entirely into the frame. If the application recognizes code markers, you will hear a sound. If you are unable to play the code smoothly, press the record button on the right side of the screen, this will enable automatic scanning.

Screenshots

VOSIS2 screens
PhonoPaper1 screens

Verdict

The call

The clearest difference is rating: PhonoPaper at 4.6 against VOSIS's 4.2. PhonoPaper also leads on ratings volume (45 vs 5). On price, review sentiment, update cadence and ads 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. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

PhonoPaper holds the better App Store score, 4.6 against 4.2. That said, the two scores are not equally well evidenced: PhonoPaper has 45 ratings behind it against 5, so its average is the more settled of the two. Written reviews complicate that: 86% of VOSIS's written reviews are positive against 83% of PhonoPaper's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

VOSIS ships an update every 8 months, PhonoPaper every 4 months. The most recent releases landed on September 4, 2026 and September 22, 2026 respectively.

Scorecard2 real differences · 8 level
VOSIS versus PhonoPaper: the parameters behind the verdict, then further details
ParameterVOSISPhonoPaper
PriceFreeFree
Rating4.2 (5 ratings)4.6 (45 ratings) — better
Positive reviews85.7% of reviews — better82.7% of reviews
Number of ratings545 — better
Update frequencyEvery 8 monthsEvery 4 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.012.0 — better
Further details — not scored
Size11 MB4 MB
Age rating4+4+
DeveloperLife Orange LLCAlexander Zolotov

Customer experience

VOSIS

All ratings5 ratings
Positive80.0%
Neutral0.0%
Negative20.0%
Written reviews14 reviews
Positive85.7%
Neutral0.0%
Negative14.3%

PhonoPaper

All ratings45 ratings
Positive88.9%
Neutral4.4%
Negative6.7%
Written reviews75 reviews
Positive82.7%
Neutral2.7%
Negative14.7%

In-app purchases

None

VOSIS

No in-app purchases

None

PhonoPaper

No in-app purchases

Questions

Is VOSIS free?
VOSIS is free to download, with no in-app purchases.
Is PhonoPaper free?
PhonoPaper is free to download, with no in-app purchases.
Which has better reviews, VOSIS or PhonoPaper?
PhonoPaper is rated higher. VOSIS averages 4.2 out of 5 from 5 ratings, while PhonoPaper averages 4.6 from 45 ratings.
Do VOSIS or PhonoPaper have ads?
Neither VOSIS nor PhonoPaper shows ads.
Which is updated more often, VOSIS or PhonoPaper?
VOSIS ships an update every 8 months, and PhonoPaper every 4 months. Most recently, VOSIS was updated on September 4, 2026 and PhonoPaper on September 22, 2026.

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