A.T.O.M. Streaming vs Contour
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
A.T.O.M. Streaming
This platform allows users to stream music, upload original content, and connect with a community of artists and enthusiasts. It offers features for both listeners and creators, including profile customization and content moderation.
- Become an artist or listener
- Unlimited original content uploads
- Direct content upload from app
- Profile link for brand sharing
- Connect with music enthusiasts and artists
- Copyright audio check
- Artwork image check and flagging system
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A.T.O.M. music streaming done differently! -The option to become an artist, not just a listener -Unlimited uploads of your original content -The ability to upload content directly from the app -one link on your profile to share your brand -access to a community of music enthusiast and artists A.T.O.M. is a music streaming platform for artist by artists. Sign up as either a listener or an artist with your CAE/IPI number. Share your original content with the world or simple find artists to follow, like songs, and create playlists. A.T.O.M. is committed to ensure only you can upload your content with are copyright audio check. Also we do not allow inappropriate of abusive content with are artwork image check and flagging system. please keep A.T.O.M. a safe and friendly place for listeners and artists to connect over their love of music.
Contour
This app is a unique musical instrument played by touch. It uses a visual interface where your finger's position determines the sound, offering a novel way to create drones, textures, and pads. It also functions as an AUv3 plugin for use in other music production apps.
- Touch-based sound generation
- Perceptual distance mapping
- Eleven distinct sound sheets
- MIDI input and ribbon controller
- AUv3 plugin support
- Recording functionality (Pro)
- Customizable sound sheets (Pro)
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Contour is an instrument you play by walking. Four neural decoders sit at the corners of a square. Your finger somewhere in the middle is a blend of all four, and the square is drawn as a survey sheet. The contour lines are not decoration. They come from what those four decoders actually produce, laid out so that equal distances on screen are equal perceptual distances in sound. Cross a line and the sound has changed by a measured amount. THE SHEETS Eleven of them, each a different set of four corners, each chosen by measuring the whole library rather than by ear. They are grouped by what the measurement found: BRIGHT — HEHUAN, the brightest, where all four corners hold their own. CONTRAST — BEIYIDUAN, the widest corner spread at 8.2 times. BREATH — NENGGAO, the breathiest. DEPTH — MABO, the deepest at 53 dB. RANGE — YUSHAN, the widest at 66 semitones; JIAMING, the most focused at 17. They are named after Taiwan's high mountain traverses. PLAYING IT Touch the sheet to sound it. The ribbon underneath sets pitch, or send MIDI and play it from a keyboard. Press harder and the note opens up — the contact patch of your finger is the dynamic. Hold on empty ground to drop a mark you can come back to. The readout above the ribbon tells you where you are while you are there: brightness, noise, the grid reference, the frequency. IN A HOST Contour is also an AUv3 plug-in. It runs in AUM, GarageBand, Cubasis, Logic for iPad and anything else that hosts Audio Units, with the position automatable as two parameters and the sheet recallable with your session. The plug-in draws the same map the app does, laid out for the window a host gives it. WHAT IS FREE Three sheets — BEIYIDUAN, NENGGAO and YUSHAN — with the whole instrument: the map, the ribbon, MIDI, reverb, marks, and the plug-in. No time limit and no account. CONTOUR PRO A single purchase, once, unlocks: • All eleven sheets • Recording, straight to a file • The envelope panel — attack, decay, sustain, release • Composing sheets of your own from the library, 4,845 combinations of four corners, with the map baked for the pitches they share Requires iOS 16 or later. iPhone and iPad.
Screenshots
Verdict
The clearest difference is price: Contour at Free against A.T.O.M. Streaming's $0.99. Contour also leads on update cadence (weekly vs every 3 months). A.T.O.M. Streaming's advantage is rating (5.0 vs 4.0) and in-app purchases (none vs 1). On ratings volume, ads, device support and iOS requirement 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
Contour is free to download; A.T.O.M. Streaming costs $0.99 up front. Contour sells 1 one-off in-app purchase. A.T.O.M. Streaming asks for nothing beyond the download.
A.T.O.M. Streaming holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 1 and 2 respectively.
A.T.O.M. Streaming ships an update every 3 months, Contour weekly. The most recent releases landed on October 24, 2026 and October 29, 2026 respectively.
| Parameter | A.T.O.M. Streaming | Contour |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | 5.0 (1 ratings) — better | 4.0 (2 ratings) |
| Positive reviews | — | 0.0% of reviews |
| Number of ratings | 1 | 2 — better |
| Update frequency | Every 3 months | Weekly — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | Freemium — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.1 — better | 16.0 |
| Further details — not scored | ||
| Size | 36 MB | 108 MB |
| Age rating | 12+ | 4+ |
| Developer | Connor Trzcinski | Chih Han Lin |
Customer experience
A.T.O.M. Streaming
Contour
In-app purchases
A.T.O.M. Streaming
No in-app purchases
Contour
- Contour Pro$3.99









