F vs Stereo Lag Time
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
F
This audio effect plugin offers sixteen versatile filter modes with precise controls for frequency, resonance, and analog-style saturation. Visualize your frequency response in real-time for intuitive adjustments. It integrates seamlessly with popular AUv3 compatible music production apps.
- Sixteen filter modes
- Frequency and resonance controls
- Analog-style saturation
- Wet/dry mix
- Frequency response display
- Zero Delay Feedback algorithm
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F-16 Filter is a flexible multi-mode filter with frequency response display. It features sixteen modes, frequency and resonance controls, saturation for analog-style soft clipping, and wet/dry mix. The 4 pole lowpass mode provides the frequency response of classic the Moog ladder filter. The other modes provide all of the choices available in the famous Oberheim Matrix 12 and Xpander synthesizers. At the heart of F-16 is a Zero Delay Feedback algorithm, the latest in DSP filtering technology. F-16 Filter gives you a wide variety of filtering options with pristine fidelity. F-16 Filter is an AUv3 that works inside host apps. Just open up your favorite host that supports AUv3 and add it as an effect. Compatible with GarageBand, Cubasis, Auria, BeatMaker, AudioBus, AUM, Modstep, and more. Blamsoft brings their experience creating top notch plug-ins for the desktop to iOS. The same filter modes are found in the popular Rack Extension for Propellerhead Reason. You get a desktop quality plug-in at an iOS friendly price. In addition to controlling the filter through the knobs and sliders, you can use the frequency response display to control cutoff frequency and resonance simultaneously. The sixteen filter modes available are: 1, 2, 3, and 4 Pole Lowpass 1, 2, 3, and 4, Pole Highpass 2 and 4 Pole Bandpass 2 Pole Notch 3 Pole Phase 2 Pole Highpass + 1 Pole Lowpass 3 Pole Highpass + 1 Pole Lowpass 2 Pole Notch + 1 Pole Lowpass 3 Pole Phase + 1 Pole Lowpass Tap Developer Website for sound examples.
Stereo Lag Time
This audio unit plugin creates a subtle delay between stereo channels, mimicking the Haas effect for a wider, more natural stereo image. It offers precise control over small delays and includes pitch modulation when changing delay times.
- Creates stereo channel delay
- Mimics Haas effect
- Precise control over small delays
- Pitch modulation on delay change
- Simple interface
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This is an audio unit plugin that puts a small delay between the left and right channels. Why would you want to do that? Here's why: We recently saw a video interview of a very famous guitarist in which his guitar was delayed a few milliseconds in the right channel. It may have been caused by unusual microphone placement, or perhaps it was just an error on the part of the person who recorded the video. Whatever the reason for it, it sounded great. He was playing into a vintage amp with no other reverb or delay, but the sound had a wide stereo image that didn't sound electronic or artificial and didn't distort the natural sound of the amp. This is commonly known as Haas effect. With most delay effects it's not so easy to get a precise, very small delay on just one channel, but this app does it with just one simple control. In case you need to modulate the effect, this plugin smoothly transitions between different delay time settings, causing a pitch shift while the delay time is on the move toward its new setting. This plugin is simple, so we are giving it away for free. Enjoy!
Screenshots
Verdict
The clearest difference is price: Stereo Lag Time at Free against F's $2.99. Stereo Lag Time also leads on update cadence (every 3 months vs every 8 months). F's advantage is rating (5.0 vs 4.5). On review sentiment, 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
Stereo Lag Time is free to download; F costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.
F holds the better App Store score, 5.0 against 4.5. Both are backed by a comparable volume of ratings — 18 and 38 respectively. Written reviews point the same way: 78% of F's written reviews are positive against 72% of Stereo Lag Time's.
F ships an update every 8 months, Stereo Lag Time every 3 months. The most recent releases landed on October 24, 2026 and October 23, 2026 respectively.
| Parameter | F | Stereo Lag Time |
|---|---|---|
| Price | $2.99 | Free — better |
| Rating | 5.0 (18 ratings) — better | 4.5 (38 ratings) |
| Positive reviews | 77.8% of reviews — better | 72.0% of reviews |
| Number of ratings | 18 | 38 — better |
| Update frequency | Every 8 months | Every 3 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 | 12.0 |
| Further details — not scored | ||
| Size | 15 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Blamsoft, Inc. | Blue Mangoo Consulting Company Limited |
Customer experience
F
Stereo Lag Time
In-app purchases
F
No in-app purchases
Stereo Lag Time
No in-app purchases








