Kosmonaut vs lo
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Kosmonaut
This audio effect plugin adds echoes and spatial depth to your music. It features a tape looper, multi-tap delay, filters, autopanner, and ambiance generator to create unique soundscapes. Save and recall your custom presets across different music production apps.
- Tape looper with sound-on-sound decay
- 4-Tap Delay with complex feedback
- LP/HP filters with LFO
- Autopanner
- Ambiance Generator
- Haas Effect Processor
- User preset saving
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*** Note: this is an Audio Unit Effect Plugin (AUv3) which requires a compatible host or DAW to work. *** Kosmonaut is Multitap Delay with a twist. In addition to adding echoes to your audio, it packs a bunch of extra tools to put your music in space: - Tape looper with with variable sound-on-sound decay level - 4-Tap Delay (placed in series for complex feedback loops) - LP/HP filters with LFO - Autopanner - Ambiance Generator - Haas Effect Processor (aka 'wavefront precedence effect') All features are demonstrated extensively in a ton of factory presets, and you can easily add your own user presets, which will automatically carry over across different host apps. All variables are exposed as AU Parameters in hosts which support automation. It also has a smart Random-feature, which may come up with usable results :-) Check out ruismaker.com for the user manual and audio demos.
lo
This app offers a versatile toolkit for manipulating audio with a variety of lo-fi effects. Explore historical audio degradation, modern digital artifacts, and analog warmth to transform your sound.
- Convolution reverb with unique impulse responses
- Spectral processing for MP3 simulation and pitch shifting
- Digital section with bitcrusher and CD stutter
- Analog section with tape saturation and noise generation
- Rearrangeable processing sections
- Dozens of presets for sound warping
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"LO‑FI‑AF is a very capable lo‑fi toolkit capable of surgically targeted destruction and it could easily find applications in just about any musical genre" -SoundOnSound Unfiltered Audio's lo-fi-af is now available on iOS as a Standalone app or AUv3 plugin! lo-fi-af takes your sound on a journey of artifacts and noise throughout recorded history, from tape warbles and vinyl noise to MP3 chirps and cell phone speaker chatter. lo-fi-af's many sections and versatile algorithms can place your sound in a different decade, or give it a thoroughly modern spin through compound processing. The first section is a convolution reverb preloaded with impulse responses from broken microphones, toy speakers, cell phones, and more. With this section alone, you can place your sound into an entirely different space. The Spectral section then splits your sound into thousands of frequencies before reconstructing it with a twist. Here you can reproduce the sound of a pirated MP3 or pitch shift your signal with clean perfection. Your signal then takes a trip through the digital section. All sorts of hazards are present here, from a skipping CD stutter effect to a multimode bitcrusher. Finally, the rich, colorful analog section adds that vibe that you crave. A maximizer, a tape saturator, a noise generator, an analog-style filter, a pitch warbler, and a radio demodulator all work together in harmony to toss your sound into the past. But wait! That's only one possible signal chain. The Convolution, Spectral, Digital, and Analog sections can be completely rearranged in any order. Dozens of presets will get your started on your sound warping adventure. As an AUv3 plugin, lo-fi-af has been tested to work perfectly with Garageband, Drambo, AUM, Cubasis, Beatmaker, Nanostudio, apeMatrix, Loopy Pro, and more! Additionally, with its clear layout and smart resizing, lo-fi-af can be used on tablets and phones with ease. (Note for Drambo users: Drambo does not yet have automatic Plugin Delay Compensation for managing plugins with latency. As a result, tracks with lo-fi-af will not line up properly with other tracks. An upcoming patch for Drambo will add this feature in.)
Screenshots
Verdict
The clearest difference is review sentiment: Kosmonaut at 94% against lo's 67%. Kosmonaut also leads on price ($3.99 vs $9.99). lo's advantage is rating (5.0 vs 4.8). On ratings volume, update cadence, 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
Kosmonaut costs $3.99 and lo $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.
lo holds the better App Store score, 5.0 against 4.8. Both are backed by a comparable volume of ratings — 68 and 29 respectively. Written reviews complicate that: 94% of Kosmonaut's written reviews are positive against 67% of lo's, so the app with the better star average is not the one people write more warmly about.
Kosmonaut ships an update every 8 days, lo fortnightly. The most recent releases landed on October 8, 2026 and October 6, 2026 respectively.
| Parameter | Kosmonaut | lo |
|---|---|---|
| Price | $3.99 — better | $9.99 |
| Rating | 4.8 (68 ratings) | 5.0 (29 ratings) — better |
| Positive reviews | 93.8% of reviews — better | 66.7% of reviews |
| Number of ratings | 68 — better | 29 |
| Update frequency | Every 8 days — better | Fortnightly |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 10.0 — better | 11.0 |
| Further details — not scored | ||
| Size | 4 MB | 17 MB |
| Age rating | 4+ | 4+ |
| Developer | Bram Bos | Unfiltered Audio |
Customer experience
Kosmonaut
lo
In-app purchases
Kosmonaut
No in-app purchases
lo
No in-app purchases









