# 声log vs Image To PDF

The clearest difference is in-app purchases: 声log at none against Image To PDF's 2. Image To PDF's advantage is ads (none vs shown) and iOS requirement (13.0 vs 15.1). On price, update cadence and device support there is nothing between them.

Both are free to download. Image To PDF sells 2 in-app purchases, starting at $1.99 per 7 days. 声log asks for nothing beyond the download.

Both ship on a similar rhythm, roughly daily. The most recent releases landed on October 30, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | 声log | Image To PDF |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Daily | Daily |
| Size | 24 MB | 58 MB |
| Requires iOS | 15.1 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Infigate.Co.Ltd](https://appshunter.io/developer/1526155171) | [Sudong Lu](https://appshunter.io/developer/1865078472) |

## What reviewers say

### 声log

[App page](https://appshunter.io/ios/app/log/id6742862986)

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

**In-app purchases:** none


### Image To PDF

[App page](https://appshunter.io/ios/app/image-to-pdf-pdf-conveter/id6760633814)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Plan | $1.99 | per 7 days |
| Yearly Plan | $17.99 | per year |


## Frequently asked questions

### Is 声log free?

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

### Is Image To PDF free?

Image To PDF is free to download, with in-app purchases available.

### Do 声log or Image To PDF have ads?

声log shows ads; Image To PDF does not.

### Which is updated more often, 声log or Image To PDF?

声log ships an update daily, and Image To PDF daily. Most recently, 声log was updated on October 30, 2026 and Image To PDF on October 28, 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.*