# Themby vs MoltViewer

The clearest difference is in-app purchases: MoltViewer at none against Themby's 3. MoltViewer also leads on update cadence (every 5 days vs monthly). Themby's advantage is ads (none vs shown). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Themby sells 3 one-off in-app purchases. MoltViewer asks for nothing beyond the download.

Themby ships an update monthly, MoltViewer every 5 days. The most recent releases landed on September 17, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | Themby | MoltViewer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Monthly | **Every 5 days** |
| Size | 108 MB | 15 MB |
| Requires iOS | **18.2** | 18.6 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 9+ |
| Developer | [建宏 陈](https://appshunter.io/developer/1863972791) | [Krzysztof Kuzmicki](https://appshunter.io/developer/1865154433) |

## What reviewers say

### Themby

[App page](https://appshunter.io/ios/app/themby/id6757106291)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 中杯 | $1.99 | one-time |
| 大杯 | $3.99 | one-time |
| 超大杯 | $9.99 | one-time |


### MoltViewer

[App page](https://appshunter.io/ios/app/moltviewer/id6758548818)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Themby free?

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

### Is MoltViewer free?

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

### Do Themby or MoltViewer have ads?

MoltViewer shows ads; Themby does not.

### Which is updated more often, Themby or MoltViewer?

Themby ships an update monthly, and MoltViewer every 5 days. Most recently, Themby was updated on September 17, 2026 and MoltViewer on September 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.*