Comparison

MF vs SL950

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

MF

This app recreates a classic analog effects pedal, offering a voltage-controlled oscillator with variable waveshape and envelope follower. It allows for processing and modulation of various audio inputs to create unique musical sounds.

Highlights
  • Voltage-controlled oscillator (VCO)
  • Variable waveshape
  • Hard sync and frequency modulation
  • Envelope follower
  • Modulate VCO frequency with input dynamics
  • Mix VCO with audio input
  • AUv3 effects plug-in
Features
Read full description

The MF-107S Freqbox is a re-invention of Moog Music’s classic Moogerfooger MF-107S analog effects pedal. The MF-107 Freqbox, originally introduced in 2007, contained several complete modular synth functions: a voltage-controlled oscillator (VCO) with variable waveshape capable of being hard synced and frequency modulated by the audio input, and an envelope follower which allowed the dynamics of the input signal to modulate the frequency of the VCO. In addition, the amplitude of the VCO was controlled by the dynamics of the input signal, and the VCO could be mixed with the audio input. A direct descendant of the original Moog modular synthesizers, the MF-107 was adapted to process, modulate, and play with inputs ranging from guitar, voice, and synthesizer to any imaginable audio source. The MF-107 Freqbox has been meticulously recreated as the MF-107S, capturing not only the jagged, freaky sounds of the original, but also the organic way in which the parameters interact to create a musical playing experience. The MF-107S is an AUv3 effects plug-in that requires a compatible host or DAW to function.

About

SL950

Features
Read full description

SL950 is a Sample Librarian for the AKAI S900 and S950 samplers. The application doesn't make any sound by itself and is designed to communicate with the hardware. The application needs a MIDI connection to the hardware to make changes. Please refer to the included manual to learn more. - Edit programs - Upload samples - Generate new programs by chopping samples Drum Machine Funk is not affiliated with AKAI and is an independent developer of innovative apps for your favorite samplers and synthesizers.

Screenshots

MF3 screens
SL9502 screens

Verdict

The call

The clearest difference is price: MF at $14.99 against SL950's $24.99. MF also leads on iOS requirement (11.0 vs 13.0). SL950's advantage is update cadence (every 4 days vs monthly). On ads, in-app purchases and device support 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

CostPrice · In-app purchases · Ads · Monetization

MF costs $14.99 and SL950 $24.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

MF ships an update monthly, SL950 every 4 days. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

Scorecard3 real differences · 7 level
MF versus SL950: the parameters behind the verdict, then further details
ParameterMFSL950
Price$14.99 — better$24.99
Rating4.4 (7 ratings) — better—
Positive reviews50.0% of reviews—
Number of ratings7 — better—
Update frequencyMonthlyEvery 4 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaid—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS11.0 — better13.0
Further details — not scored
Size41 MB24 MB
Age rating4+4+
DeveloperMoog Music Inc.Delta Seven Kft.

In-app purchases

None

MF

No in-app purchases

None

SL950

No in-app purchases

Questions

Is MF free?
MF costs $14.99, with no in-app purchases.
Is SL950 free?
SL950 costs $24.99, with no in-app purchases.
Do MF or SL950 have ads?
Neither MF nor SL950 shows ads.
Which is updated more often, MF or SL950?
MF ships an update monthly, and SL950 every 4 days. Most recently, MF was updated on November 3, 2026 and SL950 on October 31, 2026.

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