Tempus vs GRFX
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Tempus
Calculate delay times and sample re-pitch amounts with a tap-tempo metronome. Preview delay sounds and determine BPM changes for your DAW. This tool helps musicians fine-tune audio effects.
- Tap-tempo metronome
- Specify beat count for metronome
- View and preview delay times
- Calculate sample re-pitch amounts
- Calculate BPM changes
- Supports Re-Pitch Warp modes
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Tempus is a tool for calculating Delay Times and sample Re-Pitch amounts / BPMs! - Tap-tempo Metronome with the ability to specify the # of beats - View Delay Times & preview what each Delay sounds like - Calculate sample Re-Pitch amounts / BPMs when changing the BPM in your DAW & using Re-Pitch Warp modes
GRFX
Transform ordinary audio into unique sonic textures, evolving soundscapes, and rhythmic glitches. This app offers precise control over sound manipulation with a unique pitch controller, multiple LFOs, and a flexible multi-effect chain. Create complex and immersive audio transformations in real-time.
- Granular engine for textures and rhythms
- Harmonic Triangle pitch controller
- Multi-effect chain with probabilistic routing
- Four self-modulating LFOs
- Real-time audio sculpting
- AUv3 plugin and standalone app
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GRFX is a powerful and creative granular effects processor that turns ordinary audio into extraordinary sonic landscapes. Slice your sound into grains and reshape them into evolving textures, shimmering chords, rhythmic glitches, haunting drones, and more. At the heart of GRFX is the Harmonic Triangle – an intuitive 3-way pitch controller that lets you morph simple tones into lush pads, arpeggiated patterns, or abstract gestures. Whether you’re aiming for organic soundscapes or synchronized stutters, GRFX gives you precise control over the flow of grains and modulation. Build complexity with four self-modulating LFOs, a multi-effect chain with probabilistic routing, and an elegant drag-and-drop modulation system. Shape your sound, modulate nearly every parameter, and sculpt immersive audio transformations in real time. Key Features: - Granular engine for creating textures, rhythms, chords, glitches, drones, ambiences, and more - Harmonic Triangle for 3-way pitch control, detuning, and microtonality - Built-in Chord Selector with 32 triads for instant harmonic richness - Grain envelope shaping for plucky, smooth, or abrupt grains - Buffer size, division, sync, and freeze controls - Rhythmic synchronization for tempo-synced effects and patterns - 4 LFOs with self-modulation and drag-and-drop assignment - Modulation panel & view mode for streamlined modulation management - 2 Multi-Effect slots (Filter, Distortion, Delay, Peak EQ, Chorus, Phaser, Bitcrusher, Reverb) with probability-based routing - Dedicated Send FX with Delay and Reverb in series or parallel mode - Flexible mixer section for sculpting wet/dry balance and routing AUv3 Audio Unit plugin – requires an AUv3-compatible host app such as Logic Pro, GarageBand, AUM, or Cubasis. Standalone version included.
Screenshots
Verdict
The clearest difference is price: Tempus at Free against GRFX's $6.99. Tempus also leads on iOS requirement (13.0 vs 17.0). On rating, review sentiment, ratings volume and update cadence 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
Tempus is free to download; GRFX costs $6.99 up front. Neither carries in-app purchases, so what you see is what you pay.
On the App Store both sit at effectively the same score — 4.6 for Tempus against 4.6 for GRFX. Both are backed by a comparable volume of ratings — 9 and 11 respectively. Written reviews are what separate them: 83% of Tempus's written reviews are positive against 78% of GRFX's.
Tempus ships an update every 5 weeks, GRFX monthly. The most recent releases landed on October 7, 2026 and October 12, 2026 respectively.
| Parameter | Tempus | GRFX |
|---|---|---|
| Price | Free — better | $6.99 |
| Rating | 4.6 (9 ratings) | 4.6 (11 ratings) |
| Positive reviews | 83.3% of reviews — better | 77.8% of reviews |
| Number of ratings | 9 | 11 — better |
| Update frequency | Every 5 weeks | Monthly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Paid |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 13.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 8 MB | 117 MB |
| Age rating | 4+ | 4+ |
| Developer | Marcos Kohler | Imaginando Lda |
Customer experience
Tempus
GRFX
In-app purchases
Tempus
No in-app purchases
GRFX
No in-app purchases









