# K7D vs lo

The clearest difference is rating: lo at 5.0 against K7D's 4.6. lo also leads on update cadence (fortnightly vs every 3 months) and iOS requirement (11.0 vs 17.0). K7D's advantage is price ($3.99 vs $9.99) and review sentiment (80% vs 67%). On ratings volume, ads, in-app purchases and monetization model there is nothing between them.

K7D 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 4.6. Both are backed by a comparable volume of ratings — 79 and 29 respectively. Written reviews complicate that: 80% of K7D'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.

K7D ships an update every 3 months, lo fortnightly. The most recent releases landed on October 29, 2026 and October 23, 2026 respectively.

## The numbers

| Metric | K7D | lo |
| --- | --- | --- |
| Price | **$3.99** | $9.99 |
| Rating | [4.6 (79 ratings)](https://appshunter.io/ios/app/k7d-tape-delay/id1460245991/reviews) | **[5.0 (29 ratings)](https://appshunter.io/ios/app/lo-fi-af/id6444068732/reviews)** |
| Number of ratings | **79** | 29 |
| Positive reviews | **79.5% of reviews** | 66.7% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Fortnightly** |
| Monetization | Paid | Paid |
| Size | 113 MB | 17 MB |
| Requires iOS | 17.0 | **11.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Imaginando Lda](https://appshunter.io/developer/895445015) | [Unfiltered Audio](https://appshunter.io/developer/1638381375) |

## What reviewers say

### K7D

[App page](https://appshunter.io/ios/app/k7d-tape-delay/id1460245991)

This app offers a vintage tape delay effect with analog emulation and modern controls. It recreates classic hardware echo machines for a warm, characterful sound. Use it standalone or as an AUv3 plugin in iOS DAWs.

**Highlights:** Analog modeled dual playhead delay, Modeled microphone input with saturation, Normal and Ping Pong modes, High pass and Low pass feedback filters, Powerful LFO time modulation, BPM syncable delay time, MIDI delay time modulation

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 🎶 Incredible sound quality
- 🎨 Creative and musical delay
- 💡 Generous presets and easy to use
- 💰 Top-tier for the price
- 🕰️ Authentic tape delay feel

**What reviewers complain about**

- 💻 Extreme lag and crashes
- 🐛 Audio delay issues and glitches
- ⚠️ High resource usage
- ❌ No background audio standalone
- 📉 Randomiser not working (initially)

**Reported bugs**

- App crashing with many instruments
- Project crashes and data loss
- App not opening after crashes
- App deleting progress
- Randomiser not working

**Requested features**

- Fix background audio standalone
- Fix randomiser feature
- Improve CPU efficiency
- Make iPad and iPhone versions compatible
- Add reverse playback option


### lo

[App page](https://appshunter.io/ios/app/lo-fi-af/id6444068732)

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.

**Highlights:** 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

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is K7D free?

K7D costs $3.99, with no in-app purchases.

### Is lo free?

lo costs $9.99, with no in-app purchases.

### Which has better reviews, K7D or lo?

lo is rated higher. K7D averages 4.6 out of 5 from 79 ratings, while lo averages 5.0 from 29 ratings.

### Do K7D or lo have ads?

Neither K7D nor lo shows ads.

### Which is updated more often, K7D or lo?

K7D ships an update every 3 months, and lo fortnightly. Most recently, K7D was updated on October 29, 2026 and lo on October 23, 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.*