Comparison

Intervalz vs Sightlines

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

Head to head
About

Intervalz

Features
Read full description

Intervalz was first released in 2005 for the iPod. It is now back for the Apple watch! Test your ear with quick interval and music chord tests. It's fun and fast and will improve your relative pitch. Improving your relative pitch will improve your soloing, transcribing and make you a better musician. The chord ear training will help you identify chords faster making you recognize different chord types with accuracy! Features: Interval ear training. Chord ear training. Easy to use

About

Sightlines

Shape sounds with a playable harmonic filter. Add motion, stereo spread, and unique textures to noise, samples, or synths. Tune it like a resonator or control it with MIDI for endless sonic possibilities.

Highlights
  • Harmonic filter bank
  • MIDI control
  • Sample loading
  • Noise and synth sound sources
  • Modulation capabilities
  • Built-in chorus, delay, and reverb
Features
Currently charting
Read full description

Make noise, texture, and percussion sing. Add motion and stereo spread to basic sounds. Load samples and sculpt them endlessly. Leave your mark on any sound with harmonic filtering. Sightlines is a playable harmonic filter. Built from a collection of resonant bandpass filters tuned to the harmonic series, designed to bring out a customizable set of musical frequencies in any sound. Tune it to a fixed frequency like a resonator, or send it MIDI to make it come alive as an instrument. Sightlines can be loaded as an instrument or an audio effect. As an instrument, use it with samples, noise, or oscillators to construct sounds never heard before. As an effect, add movement and interest to any sound, and even impart tonality onto unpitched input. SOUND SOURCES • Noise – filter variable color noise and random noise bursts for Sightlines’ simplest and quickest output. • Samples – send samples through resonant filters as one-shots or infinite looping versions of themselves, great for found sound and tonal samples alike. • Synth – skip the filters entirely and use Sightlines as a harmonic synth, where you can customize and modulate the proportion of each harmonic in the signal. • Audio effect – use Sightlines as an audio effect on any track. MOVEMENT AND EFFECTS • Manipulate overtones – stretch, bend, and reimagine the harmonic series to retune Sightlines’ output into realistic or indescribable sonic spaces. • Quantize frequencies – snap all of Sightlines’ filters to a scale, to impart that key quality onto any sound. • Balance bands – maneuver through the harmonic space by scanning, tilting, or spreading Sightlines’ bands. • End of chain – make your output shine with a built-in chorus, BBD-style delay, and reverb. FEATURES • Modulation – modify any control in Sightlines with multiple LFOs, sequencers, smooth random sources, and performance effects. • Presets – full preset control over every parameter in Sightlines. Cross-platform preset format for sharing with friends. • Waymaker – connect to Sightlines’ sibling application, Waymaker, for direct sequencing of Sightlines’ without MIDI routing. Also available for macOS and Windows in VST3 / AU / AAX formats from Aqeel Aadam Sound.

Screenshots

Sightlines1 screens

Verdict

The call

The clearest difference is price: Intervalz at $0.99 against Sightlines's $7.99. Sightlines's advantage is update cadence (weekly vs every 43 months) and chart position (#193 vs unranked). On ads, in-app purchases 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

Intervalz costs $0.99 and Sightlines $7.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Intervalz ships an update every 43 months, Sightlines weekly. The most recent releases landed on October 13, 2026 and October 17, 2026 respectively.

Scorecard4 real differences · 7 level
Intervalz versus Sightlines: the parameters behind the verdict, then further details
ParameterIntervalzSightlines
Price$0.99 — better$7.99
Rating—5.0 (6 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—6 — better
Update frequencyEvery 43 monthsWeekly — better
AdsNoNo
In-app purchasesNoNo
Monetization—Paid
Best chart rank—#193 — better
DevicesiPhone, Apple WatchiPhone, iPad, iPod — better
Requires iOS16.013.0 — better
Further details — not scored
Size24 MB19 MB
Age rating4+4+
DeveloperAron NelsonAqeel Aadam

In-app purchases

None

Intervalz

No in-app purchases

None

Sightlines

No in-app purchases

Questions

Is Intervalz free?
Intervalz costs $0.99, with no in-app purchases.
Is Sightlines free?
Sightlines costs $7.99, with no in-app purchases.
Do Intervalz or Sightlines have ads?
Neither Intervalz nor Sightlines shows ads.
Which is updated more often, Intervalz or Sightlines?
Intervalz ships an update every 43 months, and Sightlines weekly. Most recently, Intervalz was updated on October 13, 2026 and Sightlines on October 17, 2026.

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