Comparison

Delta vs SPIDER AUDIO

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

Head to head
About

Delta

This app allows you to play classic games from various retro consoles on your iOS or iPadOS device. It supports multiple systems, online multiplayer for some games, and extensive controller customization. You can also manage game saves, use cheats, and sync your data across devices.

Highlights
  • Supports NES, SNES, N64, DS, GBA, and more
  • Online multiplayer for Nintendo DS games
  • Extensive controller support (Switch, PS, Xbox, MFi)
  • Save states with automatic backups
  • Cheat code support for various systems
  • Cross-device syncing via Google Drive/Dropbox
  • Customizable controller skins
Features
Read full description

Delta is an all-in-one emulator for iOS and iPadOS. Delta builds upon the strengths of its predecessor, GBA4iOS, while expanding to include support for more game systems such as NES, SNES, N64, Nintendo DS, and Sega Genesis. FEATURES Supported Game Systems • Nintendo Entertainment System • Super Nintendo Entertainment System • Nintendo 64 • Game Boy (Color) • Game Boy Advance • Nintendo DS • Sega Genesis Online Multiplayer • Play online-compatible Nintendo DS games with friends around the world! • Connect via community Nintendo WFC servers • Choose one of the default servers, or provide a custom DNS Controller Support • Nintendo Switch Pro controllers, Joy-Cons • Nintendo Switch Online controllers (NES, SNES, N64) • PS4, PS5 • Xbox One S, Xbox Series X • MFi game controllers • Bluetooth & wired keyboards RetroAchievements • Sign in with your RetroAchievements account to earn achievements in any supported game • Supports Hardcore mode, which disables loading save states and using cheats • Shows your achievement progress when launching a game Save States • Save and load save states for any game from the pause menu. • Lock save states to prevent them from being accidentally overwritten. • Automatically makes backup save states to ensure you never lose your progress. • Support for “Quick Saves,” save states that can be quickly saved/loaded with a single button press (requires external controller). Cheats • Supports various types of cheat codes for each supported system: • NES: Game Genie • SNES: Game Genie, Pro Action Replay • N64: GameShark • GBC: Game Genie, GameShark • GBA: Action Replay, Code Breaker, GameShark • DS: Action Replay • Genesis: Action Replay, Game Genie Delta Sync • Sync your games, game saves, save states, cheats, controller skins, and controller mappings between devices. • View version histories of everything you sync and optionally restore them to earlier versions. • Supports both Google Drive and Dropbox. Custom Controller Skins • Beautiful built-in controller skins for all systems. • Import controller skins made by others, or even make your own to share with the world! • Supports animated buttons for even more immersion when playing games Hold Button • Choose buttons for Delta to hold down on your behalf, freeing up your thumbs to press other buttons instead. • Perfect for games that typically require one button be held down constantly (e.g. run button in Mario games, or the A button in Mario Kart). Fast Forward • Speed through slower parts of games by running the game much faster than normal. • Easily enable or disable from the pause menu, or optionally with a mapped button on an external controller. • Customize speed per-game by long-pressing Fast Forward option in pause menu. 3D/Haptic Touch • Use 3D or Haptic Touch to “peek” at games, save states, and cheat codes. • App icon shortcuts allow quick access to your most recently played games, or optionally customize the shortcuts to always include certain games. Game Artwork • Automatically displays appropriate box art for imported games. • Change a game’s artwork to anything you want, or select from the built-in game artwork database. Misc. • Gyroscope support (WarioWare: Twisted! only) • Microphone support (DS only) • Support for delta:// URL scheme to jump directly into a specific game. Delta Terms of Use: https://altstore.io/terms **Delta is in no way affiliated with Nintendo. The name "Nintendo" and all associated game console names are registered trademarks of Nintendo Co., Ltd.**

About

SPIDER AUDIO

Control your car's audio system with this app. It allows you to tune radio stations, play music from USB, and manage Bluetooth audio playback with ID3 information display and EQ controls.

Highlights
  • Radio station scanning and tuning
  • USB music playback with ID3 info
  • Bluetooth music playback with ID3 info
  • External audio input via AUX
  • Play/pause and track control
  • Treble and bass level adjustment
Read full description

Radio mode on APP can scan/store/channel up & down to tune necessary station frequency. USB mode can play music stored in USB and display ID3 information. AUX mode allows external audio input to head unit. APP can control play BT music through Bluetooth and display ID3 information. APP has play/pause/previous/next control and treble/bass level control. Features: . adjust USB music audio level control and treble/bass level control. .display USB music/BT music ID3 information. .adjust BT music audio level control and treble/bass level control.

Screenshots

Delta4 screens
SPIDER AUDIO4 screens

Verdict

The call

The clearest difference is in-app purchases: SPIDER AUDIO at none against Delta's 3. SPIDER AUDIO also leads on rating (5.0 vs 4.8) and iOS requirement (10.3 vs 17.4). Delta's advantage is ratings volume (28K vs 1) and chart position (#69 vs unranked). On price, update cadence, ads 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

Both are free to download. Delta sells 3 in-app purchases, starting at $10.00 per month. SPIDER AUDIO asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

SPIDER AUDIO holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Delta has 28K ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

Delta ships an update monthly, SPIDER AUDIO every 2 months. The most recent releases landed on October 29, 2026 and October 20, 2026 respectively.

Scorecard6 real differences · 5 level
Delta versus SPIDER AUDIO: the parameters behind the verdict, then further details
ParameterDeltaSPIDER AUDIO
PriceFreeFree
Rating4.8 (28K ratings)5.0 (1 ratings) — better
Positive reviews81.2% of reviews—
Number of ratings28K — better1
Update frequencyMonthly — betterEvery 2 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
Best chart rank#69 — better—
DevicesiPhone, iPadiPhone, iPod
Requires iOS17.410.3 — better
Further details — not scored
Size228 MB45 MB
Age rating4+4+
DeveloperTestut TechSIU KEUNG CHAN

Customer experience

Delta

All ratings28,196 ratings
Positive94.2%
Neutral2.0%
Negative3.8%
Written reviews3,271 reviews
Positive81.2%
Neutral8.4%
Negative10.4%

SPIDER AUDIO

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

Delta

Reported bugs

4 issues
  • Certain games have graphical issues
  • DS game audio/video desync
  • Inconsistent save state behavior
  • Crashes when deleting/managing games

Requested features

7 requests
  • Add support for more consoles (GameCube, Wii, PS1, etc.)
  • Implement 3DS emulation
  • Allow custom button/control layouts
  • Add screen scaling and aspect ratio options
  • Implement local multiplayer for DS games
Show 2 more
  • Improve AirPlay functionality
  • Integrate iCloud sync support

SPIDER AUDIO

Not enough reviews yet to summarise bugs or requests.

In-app purchases

3 purchases

Delta

Subscriptions3
  • Early Adopter$10.001 Month
  • Community Member$15.001 Month
  • Friend Zone$30.001 Month
None

SPIDER AUDIO

No in-app purchases

Questions

Is Delta free?
Delta is free to download, with in-app purchases available.
Is SPIDER AUDIO free?
SPIDER AUDIO is free to download, with no in-app purchases.
Which has better reviews, Delta or SPIDER AUDIO?
SPIDER AUDIO is rated higher. Delta averages 4.8 out of 5 from 28K ratings, while SPIDER AUDIO averages 5.0 from 1 ratings.
Do Delta or SPIDER AUDIO have ads?
Neither Delta nor SPIDER AUDIO shows ads.
Which is updated more often, Delta or SPIDER AUDIO?
Delta ships an update monthly, and SPIDER AUDIO every 2 months. Most recently, Delta was updated on October 29, 2026 and SPIDER AUDIO on October 20, 2026.

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