Comparison

Cortex Cloud vs Number System Trainer

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

Head to head
About

Cortex Cloud

Manage your Nano Cortex and access cloud-based content with an elegant interface. Browse and download presets, neural captures, and more. Control your device's profile and privacy settings.

Highlights
  • Control Nano Cortex
  • Access Cortex Cloud
  • Browse users and presets
  • Download content
  • Manage profile and privacy
  • Share content
Features
Read full description

Control your Nano Cortex and access Cortex Cloud through an intuitive and elegant interface. Browse users, Presets, Neural Captures, and more. Download items to have them display instantly on your device. You can also manage your profile and change the privacy settings for any files you have uploaded to Cortex Cloud. Benefits: Access deeper customization options for your Nano Cortex. Seamlessly download Presets, Neural Captures, and other items to your Quad Cortex or Nano Cortex. Manage your profile and the items you have uploaded to Cortex Cloud. Discover and follow users. Share Presets and Neural Captures with your friends. Cortex Cloud requires a free Neural DSP account and a registered Quad Cortex or Nano Cortex. Cortex Cloud is not required to use the Quad Cortex or Nano Cortex but provides deeper customization options for the Nano Cortex.

About

Number System Trainer

Learn and master the Nashville Number System for music. This app offers interactive modules to help musicians of all levels understand chord progressions, transpose songs, and improve their ear training. It's designed for quick learning and on-the-fly musical communication.

Highlights
  • Interactive learning modules
  • Chord reading and identification
  • Instant transposition
  • Ear training exercises
  • Visual chord shapes
  • Circle of 4ths & 5ths reference
Features
Read full description

Learn the Nashville Number System by doing—not by memorizing theory. Number System Trainer helps worship musicians, guitarists, and keyboard players read number charts, change keys quickly, recognize chord movement by ear, and communicate clearly with a band. START FREE • Complete a six-step guided lesson • Practice Level 1 chart reading and ear training • Try a full song transposition • Preview Play Along and the Circle of 5ths SIX INTERACTIVE MODULES • Learn — Build the system one step at a time with a familiar progression • Read Charts — Work through four levels, from major triads to slash chords • Transpose — Move complete progressions into any of 12 keys • Ear Training — Identify diatonic, slash, and borrowed chords by sound • Play Along — Follow piano or guitar shapes, capo guidance, and timed drills • Circle of 5ths — See the seven chords in every key at a glance UNLOCK ONCE, KEEP IT One optional purchase unlocks every level, key, progression, and practice mode. There is no subscription, and Family Sharing is supported. No account or sign-in is required.

Screenshots

Cortex Cloud4 screens
Number System Trainer4 screens

Verdict

The call

The clearest difference is review sentiment: Number System Trainer at 100% against Cortex Cloud's 29%. Number System Trainer also leads on rating (5.0 vs 3.4) and update cadence (every 9 days vs every 6 weeks). Cortex Cloud's advantage is in-app purchases (none vs 1) and ratings volume (73 vs 12). On price, ads 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

Both are free to download. Number System Trainer sells 1 one-off in-app purchase. Cortex Cloud asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Number System Trainer holds the better App Store score, 5.0 against 3.4. That said, the two scores are not equally well evidenced: Cortex Cloud has 73 ratings behind it against 12, so its average is the more settled of the two. Written reviews point the same way: 29% of Cortex Cloud's written reviews are positive against 100% of Number System Trainer's.

UpkeepUpdate frequency

Cortex Cloud ships an update every 6 weeks, Number System Trainer every 9 days. The most recent releases landed on November 3, 2026 and November 10, 2026 respectively.

Scorecard7 real differences · 3 level
Cortex Cloud versus Number System Trainer: the parameters behind the verdict, then further details
ParameterCortex CloudNumber System Trainer
PriceFreeFree
Rating3.4 (73 ratings)5.0 (12 ratings) — better
Positive reviews28.9% of reviews100.0% of reviews — better
Number of ratings73 — better12
Update frequencyEvery 6 weeksEvery 9 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS13.0 — better15.0
Further details — not scored
Size100 MB11 MB
Age rating4+4+
DeveloperNeural DSPBrandon Oaks

Customer experience

Cortex Cloud

All ratings72 ratings
Positive56.9%
Neutral8.3%
Negative34.7%
Written reviews97 reviews
Positive28.9%
Neutral11.3%
Negative59.8%

Number System Trainer

All ratings12 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews8 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Cortex Cloud

No in-app purchases

1 purchases

Number System Trainer

One-time1
  • Full Unlock$2.99

Questions

Is Cortex Cloud free?
Cortex Cloud is free to download, with no in-app purchases.
Is Number System Trainer free?
Number System Trainer is free to download, with in-app purchases available.
Which has better reviews, Cortex Cloud or Number System Trainer?
Number System Trainer is rated higher. Cortex Cloud averages 3.4 out of 5 from 73 ratings, while Number System Trainer averages 5.0 from 12 ratings.
Do Cortex Cloud or Number System Trainer have ads?
Neither Cortex Cloud nor Number System Trainer shows ads.
Which is updated more often, Cortex Cloud or Number System Trainer?
Cortex Cloud ships an update every 6 weeks, and Number System Trainer every 9 days. Most recently, Cortex Cloud was updated on November 3, 2026 and Number System Trainer on November 10, 2026.

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