# Note Spark vs Harmonic Explorer

The clearest difference is update cadence: Note Spark at weekly against Harmonic Explorer's every 7 months. Harmonic Explorer's advantage is price ($0.99 vs $1.99) and iOS requirement (15.6 vs 18.0). On ads, in-app purchases and device support there is nothing between them.

Note Spark costs $1.99 and Harmonic Explorer $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Note Spark ships an update weekly, Harmonic Explorer every 7 months. The most recent releases landed on October 28, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Note Spark | Harmonic Explorer |
| --- | --- | --- |
| Price | $1.99 | **$0.99** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Weekly** | Every 7 months |
| Size | 49 MB | 2 MB |
| Requires iOS | 18.0 | **15.6** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [manolofdez](https://appshunter.io/developer/530283706) | [Philippe Zay](https://appshunter.io/developer/1200498230) |

## What reviewers say

### Note Spark

[App page](https://appshunter.io/ios/app/note-spark/id6740782864)

**In-app purchases:** none


### Harmonic Explorer

[App page](https://appshunter.io/ios/app/harmonic-explorer/id6747025974)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Note Spark free?

Note Spark costs $1.99, with no in-app purchases.

### Is Harmonic Explorer free?

Harmonic Explorer costs $0.99, with no in-app purchases.

### Do Note Spark or Harmonic Explorer have ads?

Neither Note Spark nor Harmonic Explorer shows ads.

### Which is updated more often, Note Spark or Harmonic Explorer?

Note Spark ships an update weekly, and Harmonic Explorer every 7 months. Most recently, Note Spark was updated on October 28, 2026 and Harmonic Explorer on October 30, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*