Comparison

sqrt vs Lines

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

Head to head
About

sqrt

This app allows users to trigger and manipulate sounds on a multitouch surface. The pro version enables loading custom audio files and creating personalized sound grids. It offers a unique playback control system where sound parameters are interpolated across the screen.

Highlights
  • Multitouch sound triggering
  • Drag-to-manipulate sound parameters
  • Load custom sounds (Pro version)
  • Create custom sound grids (Pro version)
  • Interpolate between parameter presets
  • Includes curated glitch sounds
Features
Read full description

SQRT is a multitouch sound board sample player. Tap on the items to trigger different sounds. Drag a triggered sound around the surface to change its parameters. Use the two buttons on the side to change the way how you can play / trigger the sounds. With the pro version you can load in your own sounds (using iTunes or AudioShare) and create your own grids! SQRT comes with a specially designed set of (glitch) sounds by composer/sound designer Ctrl-t (aka Jan T.) and are an incarnation of one of his recent (live) pieces. If you want to use your own sounds, get the pro version! What is special about SQRT? The sounds can be triggered from one point on the screen but the playback behavior can be manipulated over the entire screen. For each 'trigger point' there are snapshots of parameter settings spread across the playing area. The playback behavior is changed by interpolating between these presets. Currently the presets define pitch, loop start and loop length.

About

Lines

This audio effect plugin transforms any signal into a wide spectrum of sounds, from lo-fi to distortion and feedback. It can also function as an experimental synthesizer, creating rhythms and soundscapes even without input.

Highlights
  • Creative signal mangling
  • Experimental synthesizer
  • Feedback-based sound design
  • Wide range of audio effects
  • Rhythm and soundscape generation
Features
Read full description

Lines is an effect plugin that crosses borders: it can be used as a creative mangler of all kinds of signals, ranging from lo-fi telephone sounds, lush phasing, warm distortions, crushing feedback, ring modulation and unique frequency shifting. But even without any input, it can be an experimental synthesizer based on feedback, allowing for a wide range of inspiring rhythms, pulses, and organic soundscapes. If you combine input and internal engines an unheard spectrum of sounds appears.

Screenshots

sqrt3 screens
Lines1 screens

Verdict

The call

The clearest difference is price: sqrt at Free against Lines's $19.99. sqrt also leads on update cadence (every 5 weeks vs every 13 months) and iOS requirement (8.4 vs 12.0). Lines's advantage is rating (5.0 vs 3.3) and review sentiment (100% vs 58%). On ratings volume, 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

sqrt is free to download; Lines costs $19.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Lines holds the better App Store score, 5.0 against 3.3. Both are backed by a comparable volume of ratings — 7 and 11 respectively. Written reviews point the same way: 58% of sqrt's written reviews are positive against 100% of Lines's.

UpkeepUpdate frequency

sqrt ships an update every 5 weeks, Lines every 13 months. The most recent releases landed on September 11, 2026 and September 26, 2026 respectively.

Scorecard6 real differences · 4 level
sqrt versus Lines: the parameters behind the verdict, then further details
ParametersqrtLines
PriceFree — better$19.99
Rating3.3 (7 ratings)5.0 (11 ratings) — better
Positive reviews57.9% of reviews100.0% of reviews — better
Number of ratings711 — better
Update frequencyEvery 5 weeks — betterEvery 13 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree with in-app purchases — betterPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS8.4 — better12.0
Further details — not scored
Size14 MB29 MB
Age rating4+4+
DeveloperTeaTracksAudioThing Ltd.

Customer experience

sqrt

All ratings7 ratings
Positive42.9%
Neutral28.6%
Negative28.6%
Written reviews19 reviews
Positive57.9%
Neutral10.5%
Negative31.6%

Lines

All ratings11 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews5 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

sqrt

No in-app purchases

None

Lines

No in-app purchases

Questions

Is sqrt free?
sqrt is free to download, with no in-app purchases.
Is Lines free?
Lines costs $19.99, with no in-app purchases.
Which has better reviews, sqrt or Lines?
Lines is rated higher. sqrt averages 3.3 out of 5 from 7 ratings, while Lines averages 5.0 from 11 ratings.
Do sqrt or Lines have ads?
Neither sqrt nor Lines shows ads.
Which is updated more often, sqrt or Lines?
sqrt ships an update every 5 weeks, and Lines every 13 months. Most recently, sqrt was updated on September 11, 2026 and Lines on September 26, 2026.

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