FAC Alteza vs Progressions
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
FAC Alteza
This app provides an exospheric stereo reverb with ultra-low latency pitch shifting for lush, dreamy sound textures. It features a unique feedback processor, fine-tuning of all-pass delays, and advanced controls for stereo width and sidechain ducking. Designed for musicians seeking ethereal soundscapes.
- Exospheric stereo reverb
- Ultra-low latency pitch shifting
- Shimmer and harmonizer effects
- Unique feedback processor
- All-Pass delay fine-tuning
- Sidechain input for ducking
- Separate Dry/Wet and feedback outputs
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• Exospheric stereo reverb with ultra low latency pitch shifting • Amazingly lush, dreamy and beautiful • Shimmer kind effect, harmonizer • Unique feedback processor and fine tuning of the All-Pass delays • High-pass filter and stereo width input controls, separate Dry/Wet outputs • Sidechain input to duck the reverb • Multiple outputs, extra output bus to route the feedback signal to your own fxs • Advanced Responsive Design, portrait and landscape views • iOS Audio Unit V3 - Universal (iPad/iPhone) Designed for ethereal lush sound textures and dreamy space reflection, FAC Alteza is the perfect solution to bring your instruments to heaven in no time. Thanks to a powerful feedback section containing, inter alia, two pitch shifters, the unit is able to deliver the very typical "Shimmer" sound kind effect very much prized by musicians that are making ambient music, or any kind of music that needs to be carried by a fabulous angelic evolving choir section. FAC Alteza is definitely not "another shimmer reverb..." effect because it comes with additional parameters that make it very versatile. A particular attention to each part of the signal path was necessary to reach this level of high-end quality. Here some features that make FAC Alteza an outstanding unit: • the input signal is not monoized by default, a knob allows to control the width of the input stereo image before reaching the reverb • the topology of the effect, based upon a series of All-Pass delays, allows to control the intrasec characteristics of the reverberation • the number of All-Pass delays per stage and the echo density are alterable in the main section and in the feedback section • two ultra low latency pitch shifters deliver progressive pitch-shifting of the reverberation tail or the input signal • the feedback section contains a blend knob to control how much of the original signal is mixed with the feedback reverb • the wet signal can be ducked by an external signal provided by the host - AuV3 and Standalone App - To use the sidechain and/or to output the additional feedback signal, you need a host able to provide to the AuV3 an input bus and an additional output bus. The documentation is available at fredantoncorvest.com/FAC_Alteza.html
Progressions
Generate unique chord progressions beyond traditional scales using mathematical algorithms. Control complexity and freedom to explore new harmonic territories. Features include arpeggiators, strumming patterns, and humanization for expressive musical output.
- Generate unique chord progressions
- Adjust complexity and freedom levels
- Block Chord, Arpeggiator, and Strummer modes
- Supports open and closed chords with selectable voicings
- Humanize chord and note timings
- Integrated ARP and STRUM pattern editor
- Sync multiple instances
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Progressions is an AUv3 MIDI plugin for your favourite DAW. It can be used to generate a unique set of chords that are unrelated to traditional scales, which become predictable and repetative over time. Instead, Progressions uses a unique way of mathermaically generating a series of related chords using only a root note and mode (major or minor). Chord sequences are limited by the selected complexity and freedom levels, which mimic the way traditional composers of old would wander away from tonality and back again. The complexity level start off at Basic, which uses only the most common chords (I, IV, V and relative minor ii, iii, and vi triads). As you progress through the levels, you can add parallel majors and minors, sus and dom chords etc. At level 3 we start to introduce 6th and 7th chords, and then 9ths chords, all the way to 11ths, 13ths, Quartals and all their variations. The freedom level allows us to specify how far to drift away from tonality (the root), even allowing you to create never ending randomized soundscapes. Progressions allows you to quickly randomize a toolbox of chords, that can be played in a variety of modes (block chords, arpeggiated, or strummed). These can be synced to a host application, triggered remotely or pieced together into a song. Song mode allow you to change play modes on the fly as well as being able to control many features of the app in real time. Progressions supports open and closed chords with selectable voicings. It has an intelligent algorithm that attempts to align top notes of chords, add additional bass, and open chord padding to give equal weight to chords with only 3 notes. You can even play with rootless voicings. The Humanize section allows you to control chord and note timings, as well as set velocity variations to ensure things don't get too robitic. Progressions also features an integrated arpeggiator and strummming pattern editor. You can load up to 6 arp and 6 strum patterns at the same time and seemlessly switch between them manually, remotely, or using song mode. If you run multiple instances, Progressions allows you to sync your chord pads, song chain, arpeggiator / strum patterns between instances. Progressions can be loaded as a MIDI plugin or as an Instrument for those programs that don't support MIDI plugins (such as GB). Additionally when loaded as an instrument, you can use either internal sounds (soundfonts) or send MIDI directly to other MIDI instruments. Features • Block Chord, Arpeggiator and Strummer modes. • Supports open and closed Chords. • Varying complexity levels of chords. • Freedom levels control how far from the root key you can go. • Rootless voicing mode. • Open chord padding support. • Additional bass note mode. • Supports all common chord types. • Edit the preferred chord list to exclude certain chord types. • Input MIDI control for chords and play modes. • Automatic top note alignment of chords. • Hold Pedal support. • Built in ARP and STRUM editor. • Humanize options for chord and note velocity and timings. • Comprehensive Song Mode with 256 steps and looping. • Randomize chord progressions, arps and strumming patterns. • Route Chord/Arp/Strum modes & MIDI thru to any of 4 output ports. • Supports soundfonts when loaded as an Instrument plugin. • Sync multiple instances of Progressions. • AUv3 compatible MIDI plugin supporting Sync to Host.
Screenshots
Verdict
The clearest difference is rating: FAC Alteza at 4.9 against Progressions's 4.1. FAC Alteza also leads on review sentiment (94% vs 67%) and price ($9.99 vs $14.99). Progressions's advantage is in-app purchases (none vs 3) and update cadence (every 2 weeks vs every 5 months). On ratings volume, ads, monetization model 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
FAC Alteza costs $9.99 and Progressions $14.99 up front. FAC Alteza sells 3 one-off in-app purchases. Progressions asks for nothing beyond the download.
FAC Alteza holds the better App Store score, 4.9 against 4.1. Both are backed by a comparable volume of ratings — 81 and 34 respectively. Written reviews point the same way: 94% of FAC Alteza's written reviews are positive against 67% of Progressions's.
FAC Alteza ships an update every 5 months, Progressions every 2 weeks. Both last shipped on September 29, 2026.
| Parameter | FAC Alteza | Progressions |
|---|---|---|
| Price | $9.99 — better | $14.99 |
| Rating | 4.9 (81 ratings) — better | 4.1 (34 ratings) |
| Positive reviews | 93.9% of reviews — better | 66.7% of reviews |
| Number of ratings | 81 — better | 34 |
| Update frequency | Every 5 months | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Paid | Paid |
| Best chart rank | — | #189 — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 | 13.0 |
| Further details — not scored | ||
| Size | 3 MB | 117 MB |
| Age rating | 4+ | 4+ |
| Developer | Frederic Corvest | 4Pockets.com |
Customer experience
FAC Alteza
Progressions
Bugs and requests
FAC Alteza
Reported bugs
2 issues- Not working on 2021 iPad as host
- Doesn't freeze properly in Cubasis
Requested features
4 requests- Presets toned down
- Encoders rotate slower for fine adjustments
- More presets
- MIDI control by foot switches
Progressions
Not enough reviews yet to summarise bugs or requests.
In-app purchases
FAC Alteza
- Small Tip$1.99
- Medium Tip$4.99
- Large Tip$14.99
Progressions
No in-app purchases
Questions
Is FAC Alteza free?
Is Progressions free?
Which has better reviews, FAC Alteza or Progressions?
Do FAC Alteza or Progressions have ads?
Which is updated more often, FAC Alteza or Progressions?
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