# SFX Library vs SpellSynth

The clearest difference is price: SFX Library at Free against SpellSynth's $2.99. SFX Library also leads on rating (5.0 vs 3.2) and iOS requirement (14.0 vs 17.0). SpellSynth's advantage is ads (none vs shown) and update cadence (every 6 days vs every 3 weeks). On in-app purchases and device support there is nothing between them.

SFX Library is free to download; SpellSynth costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

SFX Library holds the better App Store score, 5.0 against 3.2. That said, the two scores are not equally well evidenced: SpellSynth has 11 ratings behind it against 1, so its average is the more settled of the two.

SFX Library ships an update every 3 weeks, SpellSynth every 6 days. The most recent releases landed on October 9, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | SFX Library | SpellSynth |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/sfx-library/id6738878793/reviews)** | [3.2 (11 ratings)](https://appshunter.io/ios/app/spellsynth-retro-vocal-synth/id6762822700/reviews) |
| Number of ratings | 1 | **11** |
| Positive reviews | — | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 3 weeks | **Every 6 days** |
| Monetization | **Ad-supported** | Paid |
| Size | 30 MB | 112 MB |
| Requires iOS | **14.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Jonathan Stinson](https://appshunter.io/developer/1655952998) | [Chih Han Lin](https://appshunter.io/developer/1800248325) |

## What reviewers say

### SFX Library

[App page](https://appshunter.io/ios/app/sfx-library/id6738878793)

Access a vast collection of copyright-free sound effects directly on your mobile device. Play audio clips instantly for your projects or enjoyment.

**Highlights:** Copyright-free sound effects library, Instant audio playback, On-device access, Wide range of audio clips

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

**In-app purchases:** none


### SpellSynth

[App page](https://appshunter.io/ios/app/spellsynth-retro-vocal-synth/id6762822700)

This app recreates a classic 1978 spelling toy with four engaging game modes. It allows users to type any word or phrase and hear it spoken aloud using vintage synthesized voices. Explore different speech synthesis eras and even play the keypad with a MIDI keyboard.

**Highlights:** Type and hear any word spoken, Four game modes (Free Play, Spell, Mystery Word, Say It), Three distinct vintage voice characters, MIDI keyboard support, Export audio to WAV, Adjustable gap between words

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

**In-app purchases:** none


## Frequently asked questions

### Is SFX Library free?

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

### Is SpellSynth free?

SpellSynth costs $2.99, with no in-app purchases.

### Which has better reviews, SFX Library or SpellSynth?

SFX Library is rated higher. SFX Library averages 5.0 out of 5 from 1 ratings, while SpellSynth averages 3.2 from 11 ratings.

### Do SFX Library or SpellSynth have ads?

SFX Library shows ads; SpellSynth does not.

### Which is updated more often, SFX Library or SpellSynth?

SFX Library ships an update every 3 weeks, and SpellSynth every 6 days. Most recently, SFX Library was updated on October 9, 2026 and SpellSynth on October 19, 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.*