# SignalProof vs Nafnti

The clearest difference is in-app purchases: SignalProof at none against Nafnti's 4. Nafnti's advantage is iOS requirement (15 vs 17.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Nafnti sells 4 in-app purchases, starting at $3.99 per month. SignalProof asks for nothing beyond the download.

SignalProof ships an update every 3 weeks, Nafnti every 2 weeks. Both last shipped on October 31, 2026.

## The numbers

| Metric | SignalProof | Nafnti |
| --- | --- | --- |
| 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** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 2 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 7 MB | 193 MB |
| Requires iOS | 17.0 | **15** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Borealbit Technology Limited](https://appshunter.io/developer/1808424081) | [WINGSTART HONG KONG LIMITED](https://appshunter.io/developer/6793084685) |

## 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


### Nafnti

[App page](https://appshunter.io/ios/app/nafnti/id6793344641)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Basic Monthly | $3.99 | per month |
| Pro Monthly | $6.99 | per month |
| Basic Family Annual | $54.99 | per year |
| Pro Family Annual | $107.99 | per year |


## Frequently asked questions

### Is SignalProof free?

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

### Is Nafnti free?

Nafnti is free to download, with in-app purchases available.

### Do SignalProof or Nafnti have ads?

Neither SignalProof nor Nafnti shows ads.

### Which is updated more often, SignalProof or Nafnti?

SignalProof ships an update every 3 weeks, and Nafnti every 2 weeks. Most recently, SignalProof was updated on October 31, 2026 and Nafnti on October 31, 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.*