F vs Harmonizer audio effect
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.
Harmonizer audio effect
This real-time audio effect app shifts pitch and adds harmonies to your original sound. It functions as an Audio Unit plugin or a standalone effect using your device's microphone or external audio interfaces. The pitch shifting preserves the original timing and tempo.
- Real-time pitch shifting
- Two harmony voices
- Smooth pitch shift controls
- Adjustable voice volumes
- Master reverb effect
- Standalone mode via microphone
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Harmonizer is real time audio pitch shifter effect that can mix harmonies into the original signal or run as realtime pitch shifter. The app works as an Audio Unit plugin and can also be used as stand alone real time effect via the device microphone or using iRig or similar device. The pitch shifting does NOT affect timing so the tempo stays the same. Features: - 2 harmony voices - smooth pitch shift controls - half tones and cents - dry volume (original voice) - efx 1 volume (pitch shifted voice 1 volume) - efx 2 volume (pitch shifted voice 2 volume) - reverb (master reverb) - EFX on/off button (in stand alone mode) If you play acoustic instrument you can use headphones without a mic and put the phone close to your instrument so the app will work as realtime effect. Now you can play and sing with harmonies.
Screenshots
Verdict
The clearest difference is review sentiment: F at 78% against Harmonizer audio effect's 23%. F also leads on rating (5.0 vs 3.0). Harmonizer audio effect's advantage is price ($1.99 vs $2.99) and iOS requirement (10.0 vs 12.0). 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
F costs $2.99 and Harmonizer audio effect $1.99 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 3.0. Both are backed by a comparable volume of ratings — 18 and 9 respectively. Written reviews point the same way: 78% of F's written reviews are positive against 23% of Harmonizer audio effect's.
Both ship on a similar rhythm, roughly every 8 months. The most recent releases landed on October 9, 2026 and October 7, 2026 respectively.
| Parameter | F | Harmonizer audio effect |
|---|---|---|
| Price | $2.99 | $1.99 — better |
| Rating | 5.0 (18 ratings) — better | 3.0 (9 ratings) |
| Positive reviews | 77.8% of reviews — better | 23.1% of reviews |
| Number of ratings | 18 — better | 9 |
| Update frequency | Every 8 months | Every 8 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 | 10.0 — better |
| Further details — not scored | ||
| Size | 15 MB | 14 MB |
| Age rating | 4+ | 4+ |
| Developer | Blamsoft, Inc. | Aleksandar Mlazev |
Customer experience
F
Harmonizer audio effect
In-app purchases
F
No in-app purchases
Harmonizer audio effect
No in-app purchases
Questions
Is F free?
Is Harmonizer audio effect free?
Which has better reviews, F or Harmonizer audio effect?
Do F or Harmonizer audio effect have ads?
Which is updated more often, F or Harmonizer audio effect?
Other comparisons
