# iDOS 3 vs RPGViewer

The clearest difference is review sentiment: iDOS 3 at 70% against RPGViewer's 55%. iDOS 3 also leads on chart position (#109 vs unranked). On price, update cadence, ads and in-app purchases there is nothing between them.

iDOS 3 costs $4.99 and RPGViewer $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

iDOS 3 ships an update every 6 weeks, RPGViewer every 3 weeks. Both last shipped on October 25, 2026.

## The numbers

| Metric | iDOS 3 | RPGViewer |
| --- | --- | --- |
| Price | $4.99 | $4.99 |
| Rating | **[4.3 (52 ratings)](https://appshunter.io/ios/app/idos-3/id1580768213/reviews)** | — |
| Number of ratings | **52** | — |
| Positive reviews | **69.7% of reviews** | 55.2% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 3 weeks** |
| Monetization | Free | Free |
| Best chart rank | **#109** | — |
| Size | 8 MB | 63 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 9+ |
| Developer | [潮激 李](https://appshunter.io/developer/342075158) | [Ludan Cui](https://appshunter.io/developer/1403694478) |

## What reviewers say

### iDOS 3

[App page](https://appshunter.io/ios/app/idos-3/id1580768213)

**Currently charting:** #109 Top Paid · Utilities (US App Store)

Experience classic DOS games and applications on your iPhone and iPad. This app emulates a DOS PC, offering modern controls for enhanced playability. It also supports productivity tasks like word processing and programming.

**Highlights:** On-screen keyboard with custom layouts, Virtual gamepad with customizable bindings, Trackpad mouse emulation, MT-32 emulation and MIDI support, Bluetooth keyboard and gamepad support, Bluetooth mouse support

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

**In-app purchases:** none

**What reviewers like**

- 🎮 Playable classic DOS games
- 🤖 Great DOS emulator functionality
- 🎨 Awesome interface and user experience
- 🔍 Supports mounting of various disk formats (floppies, ISOs)
- 🖥️ Works best on M1/M2/M4 iPads

**What reviewers complain about**

- 🕹️ Steep learning curve for casual users
- 🔧 Lacks support for some common disk formats (e.g. .img, .iso)
- 🎮 Issues with game controls and mapping
- 📁 Difficulty managing multiple floppy disk installers
- 🔍 Limited disk mounting options in landscape mode


### RPGViewer

[App page](https://appshunter.io/ios/app/rpgviewer/id6479395335)

Run RPG Maker MV/MZ and Flash projects with this runtime environment. It supports Ogg audio and includes a virtual keyboard for an optimized experience. Quickly test and verify your game projects.

**Highlights:** Runtime environment for RPG Maker MV/MZ, Flash project support, Ogg audio format compatibility, Virtual keyboard included, Quick project testing

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

**In-app purchases:** none

**What reviewers like**

- 👍 Games run smoothly
- 👍 Cheat menu useful
- 👍 Good for RPGMV on iOS
- 👍 Competes with Joiplay
- 👍 Supports many engines

**What reviewers complain about**

- 🐛 Virtual controls clunky
- 🐛 Screen overlay by buttons
- 🐛 Save/export not working
- 🐛 Audio issues (OGG, general)
- 🐛 Game compatibility varies

**Reported bugs**

- CG errors
- Black screen on video playback
- Button presses also register as touches
- Black screen after changing positions
- Movie folder glitches

**Requested features**

- Customizable button layout
- Portrait mode button customization
- Game folder organization
- Rename games
- Game exit button


## Frequently asked questions

### Is iDOS 3 free?

iDOS 3 costs $4.99, with no in-app purchases.

### Is RPGViewer free?

RPGViewer costs $4.99, with no in-app purchases.

### Do iDOS 3 or RPGViewer have ads?

Neither iDOS 3 nor RPGViewer shows ads.

### Which is updated more often, iDOS 3 or RPGViewer?

iDOS 3 ships an update every 6 weeks, and RPGViewer every 3 weeks. Most recently, iDOS 3 was updated on October 25, 2026 and RPGViewer on October 25, 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.*