Comparison

iDOS 3 vs RPGViewer

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

iDOS 3

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
Currently charting
Read full description

Play classic DOS games on your iPhone and iPad! iDOS turns your device right into a powerful DOS gaming PC, with modern game control to make your old favorites as playable as possible. You can also use iDOS for non-gaming purposes, such as word processing, casual programming. Apps in the DOS days are often simpler and surprisingly productive. KEYBOARD iDOS provides a PC compatible on-screen keyboard with carefully designed layouts for different devices and orientations. The keyboard has a sliding control in landscape mode so that you can keep it from covering critical part of the screen. Bluetooth keyboard is fully supported on iOS 14+. GAMEPAD iDOS provides a virtual gamepad with key bindings that are fairly common in DOS games. You can customize the bindings. The DPAD works in 8-axis way. It can also be toggled into a joystick. External bluetooth game controllers are supported. Make sure your game controller is connected (System Settings->Bluetooth). To customize button bindings, go to iDOS in landscape mode, tap on bluetooth icon on the auto-hiding top bar. MOUSE The screen area serves as a trackpad for moving mouse pointer. Tap on the screen for left click. If direct touch is enabled, the mouse pointer will move to where you tap. Hold one finger on the screen, and tap with another finger for right click. On-screen mouse buttons are also provided for your convenience. Bluetooth mouse are fully supported on iOS 14+. AUDIO iDOS supports mt32 emulation, MIDI sound fonts, cuesheet based CDimage with compressed audio tracks (ogg/mp3/flac). SUPPORT - Visit https://litchie.com/dospad for more information - Send email to idos@litchie.com - Follow the developer on Twitter: https://twitter.com/litchiedev - iDOS is open source, report issue on https://github.com/litchie/dospad

About

RPGViewer

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
Read full description

RPGViewer is a player for your own RPG Maker and Flash projects, rebuilt from the ground up as a native iOS app. You bring the game. RPGViewer runs it. One app covers the engines you actually have projects in: • RPG Maker XP, VX and VX Ace — run natively through a port of the original RGSS engine, not an imitation of it. Full speed, no browser in the middle. • RPG Maker MV and MZ — full support, including OGG audio with no re-encoding. • Flash (SWF) — played through Ruffle, including Flash games that were never converted to HTML5. • HTML5 games — any self-contained page, opened from your library. Saves work the way you expect • Import existing save files. Drop in a .rpgsave or .rmmzsave from your desktop and it appears in the game's own browser save slots. • Read the game's browser saves directly. Saves the browser version made on the same origin show up here, with title, playtime, location, party and level all decoded. • Export back out. Take a save with you when you move to a new device. • Separate storage per game. Each title keeps its own saves, its own port and its own settings — nothing bleeds across games. Built for playing on a phone • On-screen gamepad with remappable keys. Bind any physical or on-screen control to whatever the game reads. • Real controller support. Connect a gamepad and it takes over, and the on-screen pad steps aside automatically. • One consistent menu. The same control, in the same corner, on every engine — only the rows change, because only the rows that do something are shown. • Fast-forward for native engine games. • Works in landscape and portrait, iPhone and iPad. RPG Maker MV and MZ only • Cheat panel built into the menu — tweak values, items and party members without leaving the game. Please note • RPGViewer is a player only. It contains no games of its own, and it cannot download them. Please make sure the projects you run are obtained through legitimate channels. • It is a generic runtime. It does not modify the source of RPG Maker or Flash projects, and it does not emulate them. • Flash playback is provided by Ruffle. Games that depend on server-side components, or that require a network service, will not run. Built for people making RPG Maker games: test your project on your phone before you ship it, and keep playing the games you already own.

Screenshots

iDOS 34 screens
RPGViewer4 screens

Verdict

The call

The clearest difference is review sentiment: iDOS 3 at 70% against RPGViewer's 55%. iDOS 3 also leads on chart position (#137 vs unranked). On price, update cadence, ads and in-app purchases there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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

UpkeepUpdate frequency

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

Scorecard2 real differences · 9 level
iDOS 3 versus RPGViewer: the parameters behind the verdict, then further details
ParameteriDOS 3RPGViewer
Price$4.99$4.99
Rating4.3 (52 ratings) — better—
Positive reviews69.7% of reviews — better55.2% of reviews
Number of ratings52 — better—
Update frequencyEvery 6 weeksEvery 3 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
Best chart rank#137 — better—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.015.0
Further details — not scored
Size8 MB63 MB
Age rating4+9+
Developer潮激 李Ludan Cui

Customer experience

iDOS 3

All ratings51 ratings
Positive82.4%
Neutral5.9%
Negative11.8%
Written reviews89 reviews
Positive69.7%
Neutral11.2%
Negative19.1%

RPGViewer

Written reviews125 reviews
Positive55.2%
Neutral32.0%
Negative12.8%

User reviews

iDOS 3

From 52 App Store ratings

What we love

  • 🎮 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

Room to improve

  • 🕹️ 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

From App Store reviews

What we love

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

Room to improve

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

Bugs and requests

iDOS 3

No bugs or feature requests surfaced in reviews.

RPGViewer

Reported bugs

56 issues
  • CG errors
  • Black screen on video playback
  • Button presses also register as touches
  • Black screen after changing positions
  • Movie folder glitches
Show 51 more
  • Save file import/export not working
  • Cannot import/export saves
  • SyntaxError: JSON Parse error: Unrecognized token '<'
  • Games with foreign language filenames fail to run
  • Audio files not playing
  • Mouse issues (holding left button)
  • Virtual pad input lag/ghosting
  • Game crashes randomly
  • Cannot save game
  • Corrupted app requiring re-download
  • Infinite loading screens
  • Loss of progress on re-download
  • Sound disappears after switching apps
  • Virtual mouse not working for some games
  • Touch not working in certain sections
  • Game files disappear after update
  • Games not showing up after re-opening app
  • Error when adding games (folder already exists)
  • Material loss in H5 games
  • iPad cannot play in landscape, buttons incomplete
  • No sound in certain games on iPad
  • App thinks RPG Maker is HTML5
  • Cannot load OGG audio with OGG compatibility enabled
  • No sound for RPGMVO audio format
  • Cannot load save files
  • Stuck on save screen
  • Cannot click/interact in some games
  • Screen clipping on iPad
  • Games not loading (stuck on loading screen)
  • Cannot add games (stuck on loading screen)
  • Display bugs (games not showing up)
  • PNG images not opening
  • Black screen on launch
  • Cannot load image effects
  • Cannot import files (no www folder)
  • Cannot interact with elements
  • Game not running after removing folder
  • No sound after update
  • Audio issues after switching apps
  • Laggy performance
  • Games larger than 1GB don't run
  • Cannot play games requiring specific keyboard keys
  • Cannot save/load games
  • Project initialization displayed every time
  • Cannot load save data from cheat menu
  • Games not responding to clicks
  • Cannot use mouse function
  • Cannot click or use
  • Games not running, showing black screen
  • Cannot import games
  • No sound in games

Requested features

25 requests
  • Customizable button layout
  • Portrait mode button customization
  • Game folder organization
  • Rename games
  • Game exit button
Show 20 more
  • Script auto-translation
  • Dark mode
  • RPG Maker XP/VX Ace support
  • Wolf RPG Editor support
  • Keyboard support/virtual keyboard
  • Adjustable screen panning
  • Option to disable screen panning
  • Full-screen game registration
  • More control buttons
  • Editable control buttons
  • Custom gamepad inputs
  • Adjustable game performance
  • Edit game icons
  • ONS simulator support
  • Cheat menu integration
  • File management within app
  • Flash side-scroller support
  • More engine support
  • APK or Windows emulator option
  • Better resolution scaling

In-app purchases

None

iDOS 3

No in-app purchases

None

RPGViewer

No in-app purchases

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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