PlaySections vs Undulator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
PlaySections
This app allows users to mark and play specific sections of audio and video files. It's ideal for practicing music, learning languages, or transcribing audio with features like loop playback, speed and pitch adjustment, and vocal cancellation.
- Section marking and playback
- Loop playback for sections or songs
- Adjustable playback speed and pitch
- Vocal cancellation and EQ
- Import from Music Library and other apps
- YouTube video support
- Background playback
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PlaySections is an audio/video player that allows you to freely set marks and play back specific sections of your audio/video files. For example, while you're playing music, you can insert marks where the song transitions between the verse and the chorus, dividing the song into sections. Then you can pick a section from the generated section list and listen to any part of the song. For each section title, you can enter multiple lines of text. As a result, in addition to verse/chorus labels, you can make notes about the chord progression, measure count, lyrics, and so on, offering a tool that you can use for many purposes. PlaySections supports section and song loop playback, allowing you to listen to your favorite section on loop. It also features useful functionality including tempo/playback speed adjustment, pitch shift, vocal cancellation, 7 band equalizer, and flip video, making it a perfect app to use in instrument, vocal, or dance practice, or when playing music by ear. Not only can it read files from the iOS Music Library, but by using the Share Extension/Open-in functionality, you can import files from other applications. For example, you can load a recording from the Voice Memo app that comes standard on the iPhone, letting you create and play back a section list for a song that you performed yourself. Even more, you can use it to study a new language, or to prepare meeting notes. Version 4.0.0 adds support for YouTube videos. Many uses - Set marks for intro, verses, chorus, instrumental solo - Set chord progressions and lyrics for each section - Practice of playing musical instruments, singing, and dancing - Analyze music structure, chords for music dictation - Great for language learners, transcription from audio files of meeting/conference Feature Highlights - Music Library Integration - YouTube video - Waveform scroll - Section Marks - Section title edit - Loop playback (section, song) - Speed control (-50% to +200%) * - Pitch control (-12 to +12) ** - 7 bands EQ control (-24dB to +12dB) ** - FX (vocal cancel) ** - Flip Video (except for YouTube videos) - Share Extension, Open-in support (File import) - Remote control, AirTurn support - Low latency playback (Audio Unit support) - Supports all major audio/video formats (AAC, MP3, WAV, AIFF, FLAC [requires iOS 11], MP4, MOV...) - Background playback (except for YouTube videos) - VoiceOver - Drag & Drop on iPad - Inter-App Audio,** * No support for DRM contents (Apple Music, ...) ** No support for Video, YouTube and DRM contents Support http://playsections.github.io/ https://twitter.com/PlaySections playsections@gmail.com --- Video by TRIAMPERSANDY - ROLLY-POP https://www.youtube.com/watch?v=0RC_rV_dCCg
Undulator
This app offers a classic modulated tremolo effect inspired by a renowned hardware processor. It allows musicians to add rhythmic movement, ethereal feedback, and detuned echoes to various instruments and samples, creating evolving soundscapes and dynamic textures.
- Modulated tremolo effect
- Ethereal feedback and detuned echoes
- AM/FM modulation
- Tempo sync
- Real-time ribbon control
- Multiple modulation waveforms
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Undulator is Eventide’s classic modulated tremolo effect from the iconic H3000 effects processor. This unique, rhythmic effect combines ethereal feedback and detuned echos, run through an AM / FM modulated tremolo. Whether used for manipulating samples or adding movement to strings, pads, guitars, and keys, Undulator is a muse for creative musicians. Add Undulator into your plug-ins collection for the most playable tremolo-style effect on your DAW or iOS device. Undulator excels at evolving pads, sync’d chops, and time-lapsing dreamy soundscapes. Combined with a multi-tap delay and powerful tremolo, Undulator’s controls give any sound sustain and shape. This is perfect for transforming ordinary synths, keys, guitars, and even vocals into evolving pads, tempo synced production elements, or ethereal and fluctuant delays. Simply put, Undulator can make shorter sounds into longer layered effects, and give sustaining sounds shape and rhythmic character. Use the Ribbon to morph tremolo patterns into vacillating and varying rhythmic territories. This can be effective for calling attention to synth pads and creating a state of flux or rarity which is otherwise arduous to achieve. - Turn up the MIX to increase the dry/effect ratio. - Utilize multiple modulation waveform shapes and sources to alter the rhythmic feel. - Subtly finesse detuning of delays by using SPREAD. - Add FEEDBACK to accentuate delays or create infinite loops. - The Secondary LFO determines how fast the depth and speed modulation “wiggle” their targets. - Lock the tremolo to tempo using SYNC. - RETRIG at the top of the waveform for a more predictable effect. - RIBBON lets you ‘play’ the effect in real-time and provides dynamic and fluid control to morph back and forth between the settings of your choice. - SLOW/FAST button toggles on a “Slow LFO” mode. Holding it down to “BRAKE” temporarily slows down the LFOs at a constant rate until released. - Update the tremolo speed in real time using the TAP button. - Available as an AUv3 plug-in and Standalone App.
Screenshots
Verdict
The clearest difference is rating: PlaySections at 4.9 against Undulator's 4.3. PlaySections also leads on price ($3.99 vs $7.99) and update cadence (every 3 weeks vs every 2 months). Undulator's advantage is review sentiment (86% vs 77%) and iOS requirement (11.0 vs 16.6). On ratings volume, ads, in-app purchases and monetization model 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
PlaySections costs $3.99 and Undulator $7.99 up front. Neither carries in-app purchases, so what you see is what you pay.
PlaySections holds the better App Store score, 4.9 against 4.3. Both are backed by a comparable volume of ratings — 16 and 12 respectively. Written reviews complicate that: 77% of PlaySections's written reviews are positive against 86% of Undulator's, so the app with the better star average is not the one people write more warmly about.
PlaySections ships an update every 3 weeks, Undulator every 2 months. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.
| Parameter | PlaySections | Undulator |
|---|---|---|
| Price | $3.99 — better | $7.99 |
| Rating | 4.9 (16 ratings) — better | 4.3 (12 ratings) |
| Positive reviews | 76.9% of reviews | 85.7% of reviews — better |
| Number of ratings | 16 — better | 12 |
| Update frequency | Every 3 weeks — better | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.6 | 11.0 — better |
| Further details — not scored | ||
| Size | 14 MB | 16 MB |
| Age rating | 4+ | 4+ |
| Developer | Hiroshi Kajihata | Eventide |
Customer experience
PlaySections
Undulator
In-app purchases
PlaySections
No in-app purchases
Undulator
No in-app purchases









