frekvens vs Lines
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
frekvens
This app offers a unique frequency shifter and stereo delay effect. It utilizes single sideband modulation and an infinite impulse response filter for advanced audio manipulation. Additional features include high/low pass filters and an LFO for delay modulation.
- Frequency shifter
- Stereo delay
- High and low pass filter
- LFO for delay modulation
- Core MIDI CC input
- Audiobus and Inter-App Audio support
- Audio Unit extension
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Frekvens is a frequency shifter and delay effect. Unlike a pitch shifter all frequencies are shifted linearly and then fed back into itself using the stereo delay unit. The frequency shifting is achieved with single sideband modulation using a hilbert transform and an infinite impulse response filter for fast computations. Frekvens also comes with a high and low pass filter and a lfo for modulating the delay play head. - frequency shifter - high, low pass filter - stereo delay - core midi cc input - audiobus - inter app audio - audio unit extension - save, load
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.
- Creative signal mangling
- Experimental synthesizer
- Feedback-based sound design
- Wide range of audio effects
- Rhythm and soundscape generation
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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
Verdict
The clearest difference is price: frekvens at $2.99 against Lines's $9.99. frekvens also leads on update cadence (every 2 months vs every 13 months). Lines's advantage is review sentiment (100% vs 83%). On rating, ratings volume, ads and in-app purchases 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
frekvens costs $2.99 and Lines $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Lines holds the better App Store score, 5.0 against 4.8. Both are backed by a comparable volume of ratings — 21 and 12 respectively. Written reviews point the same way: 83% of frekvens's written reviews are positive against 100% of Lines's.
frekvens ships an update every 2 months, Lines every 13 months. The most recent releases landed on November 2, 2026 and November 15, 2026 respectively.
| Parameter | frekvens | Lines |
|---|---|---|
| Price | $2.99 — better | $9.99 |
| Rating | 4.8 (21 ratings) | 5.0 (12 ratings) — better |
| Positive reviews | 83.3% of reviews | 100.0% of reviews — better |
| Number of ratings | 21 — better | 12 |
| Update frequency | Every 2 months — better | Every 13 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 11.0 — better | 12.0 |
| Further details — not scored | ||
| Size | 3 MB | 29 MB |
| Age rating | 4+ | 4+ |
| Developer | Erik Sigth | AudioThing Ltd. |
Customer experience
frekvens
Lines
In-app purchases
frekvens
No in-app purchases
Lines
No in-app purchases
