# RM vs Lines

The clearest difference is price: RM at $3.99 against Lines's $19.99. RM also leads on iOS requirement (9.0 vs 12.0). Lines's advantage is rating (5.0 vs 4.5) and review sentiment (100% vs 67%). On ratings volume, update cadence, ads and in-app purchases there is nothing between them.

RM costs $3.99 and Lines $19.99 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 4.5. Both are backed by a comparable volume of ratings — 19 and 11 respectively. Written reviews point the same way: 67% of RM's written reviews are positive against 100% of Lines's.

RM ships an update every 10 months, Lines every 13 months. The most recent releases landed on October 24, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | RM | Lines |
| --- | --- | --- |
| Price | **$3.99** | $19.99 |
| Rating | [4.5 (19 ratings)](https://appshunter.io/ios/app/rm-1-wave-modulator/id1436855751/reviews) | **[5.0 (11 ratings)](https://appshunter.io/ios/app/lines-feedback-multieffect/id6461267498/reviews)** |
| Number of ratings | **19** | 11 |
| Positive reviews | 66.7% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 10 months** | Every 13 months |
| Monetization | Paid | Paid |
| Best chart rank | — | **#148** |
| Size | 35 MB | 29 MB |
| Requires iOS | **9.0** | 12.0 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Kai Aras](https://appshunter.io/developer/370820899) | [AudioThing Ltd.](https://appshunter.io/developer/1659941236) |

## What reviewers say

### RM

[App page](https://appshunter.io/ios/app/rm-1-wave-modulator/id1436855751)

This audio effect app offers versatile modulation capabilities, including ring, amplitude, phase, and frequency modulation. It features a built-in carrier oscillator, multimode filter, envelope follower, and LFO for creating unique sounds. It can be used standalone or with other audio apps.

**Highlights:** Multiple modulation types (Ring, AM, FM, Phase), Built-in carrier oscillator, Multimode filter (LP, HP, BP), Envelope follower and LFO, Standalone and IAA/Audiobus support, AUv3 plugin compatibility

**Features:** macOS Compatibility

**In-app purchases:** none


### Lines

[App page](https://appshunter.io/ios/app/lines-feedback-multieffect/id6461267498)

**Currently charting:** #148 Top Paid · Music (US App Store)

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:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is RM free?

RM costs $3.99, with no in-app purchases.

### Is Lines free?

Lines costs $19.99, with no in-app purchases.

### Which has better reviews, RM or Lines?

Lines is rated higher. RM averages 4.5 out of 5 from 19 ratings, while Lines averages 5.0 from 11 ratings.

### Do RM or Lines have ads?

Neither RM nor Lines shows ads.

### Which is updated more often, RM or Lines?

RM ships an update every 10 months, and Lines every 13 months. Most recently, RM was updated on October 24, 2026 and Lines on October 15, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*