# ReadLogs vs ROS Topic Viewer

The clearest difference is price: ReadLogs at Free against ROS Topic Viewer's $4.99. ReadLogs also leads on ads (none vs shown). ROS Topic Viewer's advantage is in-app purchases (none vs 2). On update cadence, device support and iOS requirement there is nothing between them.

ReadLogs is free to download; ROS Topic Viewer costs $4.99 up front. ReadLogs sells 2 in-app purchases, starting at $9.99 per month. ROS Topic Viewer asks for nothing beyond the download.

ReadLogs ships an update every 3 weeks, ROS Topic Viewer monthly. The most recent releases landed on September 27, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | ReadLogs | ROS Topic Viewer |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | **Every 3 weeks** | Monthly |
| Size | 2 MB | 6 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Saed Zakari](https://appshunter.io/developer/1877749593) | [Jatupon Hongweing](https://appshunter.io/developer/1896471199) |

## What reviewers say

### ReadLogs

[App page](https://appshunter.io/ios/app/readlogs/id6763408310)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ReadLogs Pro | $9.99 | per month |
| ReadLogs Pro | $79.99 | per year |


### ROS Topic Viewer

[App page](https://appshunter.io/ios/app/ros-topic-viewer/id6783347908)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ReadLogs free?

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

### Is ROS Topic Viewer free?

ROS Topic Viewer costs $4.99, with no in-app purchases.

### Do ReadLogs or ROS Topic Viewer have ads?

ROS Topic Viewer shows ads; ReadLogs does not.

### Which is updated more often, ReadLogs or ROS Topic Viewer?

ReadLogs ships an update every 3 weeks, and ROS Topic Viewer monthly. Most recently, ReadLogs was updated on September 27, 2026 and ROS Topic Viewer on September 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.*