TOPLAPapp vs PhonoPaper
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
TOPLAPapp
This app offers a unique sonic puzzle experience using a virtual machine for sound synthesis. Users control the machine by placing command letters and adjusting parameter sliders to generate experimental, often noisy, electronic music.
- Virtual machine for sound synthesis
- Instruction-based sound generation
- Parameter sliders for sound control
- Grid-based command placement
- Experimental sonic art focus
- Live coding principles
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TOPLAPapp is a sonic puzzle based around a virtual machine for sound synthesis. This machine accepts a few valid instructions represented by the letters T, O, P, L, A, and p, and you control it by placing each command letter within a grid, along with setting some associated parameter sliders. The machine rushes through the instruction set to create output sounds, which are usually of a somewhat noisy character, hopefully interestingly so. The historical antecedents include instruction synthesis as pioneered at the Institute of Sonology in the 1970s, and the live coding movement, of modifying a running program as it acts. This app is intended for those interested in more experimental sonic art: don't download unless you are open to stranger computer music sounds ((http://www.toplap.org).
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.
- 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
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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
Verdict
The clearest difference is update cadence: PhonoPaper at every 4 months against TOPLAPapp's every 49 months. PhonoPaper also leads on ratings volume (45 vs 4). TOPLAPapp's advantage is rating (4.8 vs 4.6) and review sentiment (95% vs 83%). On price, ads, in-app purchases and monetization model 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
TOPLAPapp holds the better App Store score, 4.8 against 4.6. That said, the two scores are not equally well evidenced: PhonoPaper has 45 ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 95% of TOPLAPapp's written reviews are positive against 83% of PhonoPaper's.
TOPLAPapp ships an update every 49 months, PhonoPaper every 4 months. The most recent releases landed on September 24, 2026 and October 10, 2026 respectively.
| Parameter | TOPLAPapp | PhonoPaper |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (4 ratings) — better | 4.6 (45 ratings) |
| Positive reviews | 95.5% of reviews — better | 82.7% of reviews |
| Number of ratings | 4 | 45 — better |
| Update frequency | Every 49 months | Every 4 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 7.0 — better | 12.0 |
| Further details — not scored | ||
| Size | 0 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | Joshua Parmenter | Alexander Zolotov |
Customer experience
TOPLAPapp
PhonoPaper
In-app purchases
TOPLAPapp
No in-app purchases
PhonoPaper
No in-app purchases








