# KeyFinder vs Filterjam

The clearest difference is rating: Filterjam at 5.0 against KeyFinder's 2.7. Filterjam also leads on review sentiment (83% vs 60%). KeyFinder's advantage is update cadence (every 3 months vs every 22 months) and ratings volume (322 vs 34). On price, ads, in-app purchases and monetization model there is nothing between them.

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

Filterjam holds the better App Store score, 5.0 against 2.7. That said, the two scores are not equally well evidenced: KeyFinder has 322 ratings behind it against 34, so its average is the more settled of the two. Written reviews point the same way: 60% of KeyFinder's written reviews are positive against 83% of Filterjam's.

KeyFinder ships an update every 3 months, Filterjam every 22 months. The most recent releases landed on October 8, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | KeyFinder | Filterjam |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.7 (322 ratings)](https://appshunter.io/ios/app/keyfinder/id301281917/reviews) | **[5.0 (34 ratings)](https://appshunter.io/ios/app/filterjam/id1659941144/reviews)** |
| Number of ratings | **322** | 34 |
| Positive reviews | 60.0% of reviews | **83.3% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 22 months |
| Monetization | Free | Free |
| Size | 5 MB | 25 MB |
| Requires iOS | **11.0** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Scoreless Music](https://appshunter.io/developer/301281920) | [AudioThing Ltd.](https://appshunter.io/developer/1659941236) |

## What reviewers say

### KeyFinder

[App page](https://appshunter.io/ios/app/keyfinder/id301281917)

Identify the musical key of any song you're listening to. Use the integrated piano to play along and confirm notes, helping the app pinpoint the correct key. Explore music theory and learn to play songs in different keys.

**Highlights:** Identify song keys, Built-in piano keyboard, Note confirmation, Narrow down possible keys, Learn songs in any key

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 💡 Useful for finding song keys
- 👍 Simple and effective key locking
- 💡 Cool LED display
- 💡 Good for songwriting aid
- 💡 Works well for intended purpose

**What reviewers complain about**

- 🤔 Hard to use and unclear
- 🤔 No sound produced
- 🤔 Limited key support (e.g., no C sharp)
- 🤔 Slow response to touch
- 🤔 Difficulty hearing keys with background music

**Reported bugs**

- No sound
- Slow response to touch
- Cannot play minor scales in Ref mode
- Difficulty controlling volume with background music

**Requested features**

- Bring the app back
- Update to 64bit
- Label notes on piano keys
- Ability to move up and down the keyboard
- More keys supported (hundreds)


### Filterjam

[App page](https://appshunter.io/ios/app/filterjam/id1659941144)

This app offers a multiband resonant filter for creating unique audio effects. It divides input signals into four bands, allowing for various sonic manipulations from subtle enhancements to extreme sound mangling.

**Highlights:** Multiband resonant filtering, 4-band signal division, Sum or multiply band modes, Versatile sound shaping, Ringmod-like effects

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is KeyFinder free?

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

### Is Filterjam free?

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

### Which has better reviews, KeyFinder or Filterjam?

Filterjam is rated higher. KeyFinder averages 2.7 out of 5 from 322 ratings, while Filterjam averages 5.0 from 34 ratings.

### Do KeyFinder or Filterjam have ads?

Neither KeyFinder nor Filterjam shows ads.

### Which is updated more often, KeyFinder or Filterjam?

KeyFinder ships an update every 3 months, and Filterjam every 22 months. Most recently, KeyFinder was updated on October 8, 2026 and Filterjam on October 1, 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.*