Comparison

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.

Head to head
About

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.

Highlights
  • 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
Read full description

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.

About

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.

Highlights
  • 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)
Features
Read full description

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

A.T.O.M. Streaming3 screens
Contour4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard5 real differences · 5 level
A.T.O.M. Streaming versus Contour: the parameters behind the verdict, then further details
ParameterA.T.O.M. StreamingContour
Price$0.99Free — better
Rating5.0 (1 ratings) — better4.0 (2 ratings)
Positive reviews—0.0% of reviews
Number of ratings12 — better
Update frequencyEvery 3 monthsWeekly — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFreemium — better
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.1 — better16.0
Further details — not scored
Size36 MB108 MB
Age rating12+4+
DeveloperConnor TrzcinskiChih Han Lin

Customer experience

A.T.O.M. Streaming

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Contour

All ratings2 ratings
Positive50.0%
Neutral50.0%
Negative0.0%
Written reviews1 reviews
Positive0.0%
Neutral100.0%
Negative0.0%

In-app purchases

None

A.T.O.M. Streaming

No in-app purchases

1 purchases

Contour

One-time1
  • Contour Pro$3.99

Questions

Is A.T.O.M. Streaming free?
A.T.O.M. Streaming costs $0.99, with no in-app purchases.
Is Contour free?
Contour is free to download, with in-app purchases available.
Which has better reviews, A.T.O.M. Streaming or Contour?
A.T.O.M. Streaming is rated higher. A.T.O.M. Streaming averages 5.0 out of 5 from 1 ratings, while Contour averages 4.0 from 2 ratings.
Do A.T.O.M. Streaming or Contour have ads?
Neither A.T.O.M. Streaming nor Contour shows ads.
Which is updated more often, A.T.O.M. Streaming or Contour?
A.T.O.M. Streaming ships an update every 3 months, and Contour weekly. Most recently, A.T.O.M. Streaming was updated on October 24, 2026 and Contour on October 29, 2026.

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