Comparison

iDOS 3 vs RigCheck

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
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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

RigCheck

Features
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Your standing rigging keeps your mast up. Do you know when it was last inspected? RigCheck is the first and only app designed specifically for sailors who want to stay on top of their rigging condition.  Whether you're a weekend cruiser, an offshore passage maker, or a racing skipper — knowing the state of your rig isn't optional. It's the difference between a safe passage and a dismasting. Built by sailors, for sailors. SET UP YOUR BOAT IN MINUTES Tell RigCheck your rig type, spreader configuration, and rigging details. The app automatically generates every component on your boat — from cap shrouds and forestay to turnbuckles, toggles, swage fittings, and chainplates. Supports sloops, cutters, ketches, yawls, schooners, fractional rigs, gaff rigs, junk rigs, cat rigs, and more. Single, double, or triple spreader configurations. Multi-mast rigs with independent spreader levels per mast. INSPECT WITH CONFIDENCE Four professional-grade inspection checklists guide you through every check: - Pre-Sail Quick Check (15 items) — the essentials before every sail - Seasonal Inspection (40 items) — includes the nylon stocking test and swage magnification - Annual Deep Inspection (48 items) — dye penetrant testing, wire diameter measurement, tension readings - Post-Storm Damage Check (10 items) — focused on high-load damage after heavy weather Every checklist item tells you exactly what to look for, how to check it, and what failure looks like — the same knowledge a professional rigger uses. TRACK EVERYTHING OVER TIME This is what no other app does. Every inspection creates a permanent record. Every component — all 30 to 60 of them — tracks its own history: condition ratings, tension readings, inspection notes, and photos. Watch your rig age over the seasons. Spot the slow degradation before it becomes dangerous. Record standing rigging tension with your Loos gauge and track changes across haul-outs. A cap shroud that drops from 30 to 25 between seasons is telling you something important. VISUAL RIG DIAGRAM Tap directly on an interactive rigging diagram to inspect individual components. See your entire rig at a glance, color-coded by condition. Uses standard rigger nomenclature — V1, D1F, D1A, D2, D3 — so you speak the same language as your surveyor. PHOTO LOGBOOK WITH MARKUP Document your rigging with photos linked to specific components. Circle that hairline crack in a swage fitting. Annotate the corrosion creeping across a chainplate. Build a visual history you can reference at haul-out, share with your rigger, or present to a surveyor. KNOW YOUR RIG'S LIFESPAN RigCheck tracks install dates and material-specific lifespans for every component: - Wire rigging (1x19): 12 years - Rod rigging: 15 years - Dyneema: 8 years - PBO: 5 years - Stainless hardware: 20 years The app calculates your rig age and warns you as components approach end of life. No more guessing when to replace. RIGGING KNOWLEDGE BASE Learn what a professional rigger knows. In-app articles cover wire types, rod rigging, synthetic standing rigging, the nylon stocking test, swage fitting inspection, chainplate failures, common failure modes, replacement schedules, winter care, and insurance survey requirements. MANAGE YOUR FLEET Own multiple boats? RigCheck manages them all. Switch between boats instantly. Each boat maintains its own component inventory, inspection history, photo logbook, and tension records. COMPLETELY OFFLINE No account required. No subscription. No data leaves your device. RigCheck works at anchor, in a boatyard, or 500 miles offshore with zero connectivity. Your rigging data stays on your device, always accessible when you need it. There is no other app in the App Store that lets you systematically track your sailing rig condition over time. RigCheck gives you the tools and knowledge a professional rigger uses — in your pocket, every time you step aboard. Your rig is the most critical safety system on your boat. Check it.

Screenshots

iDOS 34 screens
RigCheck4 screens

Verdict

The call

The clearest difference is chart position: iDOS 3 at #192 against RigCheck's unranked. iDOS 3 also leads on iOS requirement (15.0 vs 17.0). RigCheck's advantage is price ($2.99 vs $4.99). On update cadence, ads, in-app purchases and device support 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 RigCheck $2.99 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, RigCheck monthly. The most recent releases landed on October 24, 2026 and October 17, 2026 respectively.

Scorecard3 real differences · 8 level
iDOS 3 versus RigCheck: the parameters behind the verdict, then further details
ParameteriDOS 3RigCheck
Price$4.99$2.99 — better
Rating4.3 (52 ratings) — better—
Positive reviews69.7% of reviews—
Number of ratings52 — better—
Update frequencyEvery 6 weeksMonthly — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
Best chart rank#192 — better—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better17.0
Further details — not scored
Size8 MB6 MB
Age rating4+4+
Developer潮激 李Stolk.cc

In-app purchases

None

iDOS 3

No in-app purchases

None

RigCheck

No in-app purchases

Questions

Is iDOS 3 free?
iDOS 3 costs $4.99, with no in-app purchases.
Is RigCheck free?
RigCheck costs $2.99, with no in-app purchases.
Do iDOS 3 or RigCheck have ads?
Neither iDOS 3 nor RigCheck shows ads.
Which is updated more often, iDOS 3 or RigCheck?
iDOS 3 ships an update every 6 weeks, and RigCheck monthly. Most recently, iDOS 3 was updated on October 24, 2026 and RigCheck on October 17, 2026.

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