# SyncFlowBoard vs catalk

The clearest difference is in-app purchases: SyncFlowBoard at none against catalk's 3. SyncFlowBoard also leads on update cadence (every 3 days vs every 6 months). catalk's advantage is iOS requirement (15.1 vs 17.6). On price, ads and device support there is nothing between them.

Both are free to download. catalk sells 3 in-app purchases, starting at $2.99 per month. SyncFlowBoard asks for nothing beyond the download.

SyncFlowBoard ships an update every 3 days, catalk every 6 months. The most recent releases landed on September 23, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | SyncFlowBoard | catalk |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 6 months |
| Size | 5 MB | 44 MB |
| Requires iOS | 17.6 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 9+ |
| Developer | [SUGAR SOUND, K.K.](https://appshunter.io/developer/1811951231) | [Kazuhiro Tamura](https://appshunter.io/developer/1874362756) |

## What reviewers say

### SyncFlowBoard

[App page](https://appshunter.io/ios/app/syncflowboard/id6745395365)

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

**In-app purchases:** none


### catalk

[App page](https://appshunter.io/ios/app/catalk/id6758676215)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Catalk Pro 月額プラン | $2.99 | per month |
| Catalk Pro 年間プラン | $14.99 | per year |
| Catalk Pro 買い切りプラン | $19.99 | one-time |


## Frequently asked questions

### Is SyncFlowBoard free?

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

### Is catalk free?

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

### Do SyncFlowBoard or catalk have ads?

Neither SyncFlowBoard nor catalk shows ads.

### Which is updated more often, SyncFlowBoard or catalk?

SyncFlowBoard ships an update every 3 days, and catalk every 6 months. Most recently, SyncFlowBoard was updated on September 23, 2026 and catalk on October 11, 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.*