MuSA_RT vs NoLimits2
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
MuSA_RT
This app visualizes music tonality in 3D using advanced algorithms. It analyzes audio from your microphone to identify chords and keys, displaying them with a rotating camera or in augmented reality.
- 3D tonality visualization
- Audio analysis for pitch and context
- Chord and key identification
- Augmented Reality mode
- Smooth camera rotation for unobstructed views
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MuSA_RT applies music analysis algorithms rooted in Elaine Chew’s Spiral Array model of tonality, which also provides the 3D geometry for the visualization space. The app analyzes the audio signal received from a microphone to determine pitch names, maintain short term and longterm tonal context trackers, each a Center of Effect (CE), and compute the closest triads (3-note chords) and keys as the music unfolds in performance. The 3D view presents a graphical representations of these tonal entities in context, smoothly rotating the virtual camera to provide an unobstructed view of the current information. These graphics can also be visualized in an experimental Augmented Reality mode on compatible devices.
NoLimits2
This high-end audio plugin offers advanced limiting capabilities for music production. It provides multiple algorithms for diverse sounds, from clean to saturated, with fine-tuning controls and LUFS metering. Compatible with major iOS music hosts.
- 4 distinct limiting algorithms
- Clean to saturated sound options
- Adjustable attack, release, and lookahead
- Up to 8x oversampling
- Stereo channel linking
- LUFS loudness metering
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At the end of a long day at the mixing desk, when everything has finally fallen into place, comes the best moment (just before pouring that glass of whisky): load an instance of NoLimits2 at the end of the processing chain, turn that big gain knob, lean back and enjoy. Its predecessor, NoLimits, was certainly a highly acclaimed limiting plugin already and did a very good job for many years, but NoLimits2 definitely takes it to another level. From ultraclean to tastefully saturated, NoLimits2 will make your mixes louder in style. NoLimits2 is a highend audio limiting plugin featuring: - a comprehensive set of 4 different limiting algorithms - all of them follow entirely different limiting strategies, giving you a choice of really unique sounds - from clean to nicely saturated, it’s all there - further control over attack, release and lookahead times allow for even more finetuning - up to 8x oversampling to keep all harmonics of the more colourful modes in check - stereo channel linking - state-of-the-art LUFS loudness metering, compliant to all the latest standards NoLimits2 is an AUv3 plugin which is compatible with all relevant hosts on iOS, like Logic, Garageband, Cubasis,... you name it.
Screenshots
Verdict
MuSA_RT and NoLimits2 both sit at 5.0 stars, but that hides the real split: 100% of NoLimits2's written reviews are positive against 0% of MuSA_RT's. NoLimits2 also leads on ratings volume (5 vs 1) and iOS requirement (11 vs 15.6). MuSA_RT's advantage is price (Free vs $12.99) and update cadence (every 3 months vs every 26 months). On rating, 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
MuSA_RT is free to download; NoLimits2 costs $12.99 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 — 5.0 for MuSA_RT against 5.0 for NoLimits2. That said, the two scores are not equally well evidenced: NoLimits2 has 5 ratings behind it against 1, so its average is the more settled of the two. Written reviews are what separate them: 0% of MuSA_RT's written reviews are positive against 100% of NoLimits2's.
MuSA_RT ships an update every 3 months, NoLimits2 every 26 months. The most recent releases landed on October 22, 2026 and October 24, 2026 respectively.
| Parameter | MuSA_RT | NoLimits2 |
|---|---|---|
| Price | Free — better | $12.99 |
| Rating | 5.0 (1 ratings) | 5.0 (5 ratings) |
| Positive reviews | 0.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 1 | 5 — better |
| Update frequency | Every 3 months — better | Every 26 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Paid |
| Devices | iPhone, iPad, iPod, Mac — better | iPhone, iPad, iPod |
| Requires iOS | 15.6 | 11 — better |
| Further details — not scored | ||
| Size | 3 MB | 163 MB |
| Age rating | 4+ | 4+ |
| Developer | Alexandre Francois | Christian Siedschlag |
Customer experience
MuSA_RT
NoLimits2
In-app purchases
MuSA_RT
No in-app purchases
NoLimits2
No in-app purchases









