# SignalProof vs Sticky Notes · Baro

The clearest difference is update cadence: Sticky Notes · Baro at every 2 days against SignalProof's every 3 weeks. Sticky Notes · Baro also leads on iOS requirement (13.0 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

SignalProof ships an update every 3 weeks, Sticky Notes · Baro every 2 days. The most recent releases landed on October 24, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | SignalProof | Sticky Notes · Baro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/signalproof-tone-generator/id6785174973/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 2 days** |
| Monetization | Free with in-app purchases | — |
| Size | 7 MB | 22 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Borealbit Technology Limited](https://appshunter.io/developer/1808424081) | [Euiseok Kim](https://appshunter.io/developer/1879633122) |

## What reviewers say

### SignalProof

[App page](https://appshunter.io/ios/app/signalproof-tone-generator/id6785174973)

Generate controlled audio signals for repeatable speaker, room, and sound meter checks. Save setups and results for easy comparison. Ideal for practical audio testing without ads or accounts.

**Highlights:** Sine tones and noise generation, Frequency sweeps, Left, right, or stereo output, dBFS level control, Save test sessions and presets, Export PDF reports, Local-first design, no account needed

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

**In-app purchases:** none


### Sticky Notes · Baro

[App page](https://appshunter.io/ios/app/sticky-notes-baro/id6801834841)

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

**In-app purchases:** none


## Frequently asked questions

### Is SignalProof free?

SignalProof is free to download, with no in-app purchases.

### Is Sticky Notes · Baro free?

Sticky Notes · Baro is free to download, with no in-app purchases.

### Do SignalProof or Sticky Notes · Baro have ads?

Neither SignalProof nor Sticky Notes · Baro shows ads.

### Which is updated more often, SignalProof or Sticky Notes · Baro?

SignalProof ships an update every 3 weeks, and Sticky Notes · Baro every 2 days. Most recently, SignalProof was updated on October 24, 2026 and Sticky Notes · Baro on October 26, 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.*