# LogSynth vs SL Prism

The clearest difference is price: LogSynth at $9.99 against SL Prism's $19.99. SL Prism's advantage is iOS requirement (15.0 vs 18.0). On update cadence, ads, in-app purchases and device support there is nothing between them.

LogSynth costs $9.99 and SL Prism $19.99 up front. Neither carries in-app purchases, so what you see is what you pay.

LogSynth ships an update every 2 weeks, SL Prism every 10 days. Both last shipped on October 29, 2026.

## The numbers

| Metric | LogSynth | SL Prism |
| --- | --- | --- |
| Price | **$9.99** | $19.99 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 10 days** |
| Size | 22 MB | 18 MB |
| Requires iOS | 18.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [SEAN IAN HALENWOOD](https://appshunter.io/developer/1896371669) | [VIACHESLAV ZHILTSOV](https://appshunter.io/developer/1862005860) |

## What reviewers say

### LogSynth

[App page](https://appshunter.io/ios/app/logsynth/id6792552386)

**Features:** macOS Compatibility

**In-app purchases:** none


### SL Prism

[App page](https://appshunter.io/ios/app/sl-prism/id6806684924)

**In-app purchases:** none


## Frequently asked questions

### Is LogSynth free?

LogSynth costs $9.99, with no in-app purchases.

### Is SL Prism free?

SL Prism costs $19.99, with no in-app purchases.

### Do LogSynth or SL Prism have ads?

Neither LogSynth nor SL Prism shows ads.

### Which is updated more often, LogSynth or SL Prism?

LogSynth ships an update every 2 weeks, and SL Prism every 10 days. Most recently, LogSynth was updated on October 29, 2026 and SL Prism on October 29, 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.*