Comparison

Gamma vs Digi Invaders

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

Head to head
About

Gamma

This app allows you to play your favorite PlayStation 1 games on your device. It offers enhanced graphics, controller customization, and cloud syncing for save states. Enjoy a superior gaming experience with easy file import and cheat code support.

Highlights
  • Enhanced hi-resolution graphics
  • Customizable controller skins
  • Save state syncing via cloud
  • Cheat codes system
  • Wide file format support
  • Hardware controller support
Features
Read full description

You heard about Gamma, the BEST PlayStation(tm) 1 game emulator, now see it for yourself! Gamma is a fully featured video game console emulator that's simple to use. Play your favorite console games in seconds. Gamma has the best looking user interface, complete with instant cover artwork, custom controller skins, previews, save state syncing, and more! It has achievements, enhanced hi-resolution graphics up to 8x resolution, supports external controllers and screen mirroring for multiplayer, and even supports analog controls. There's even a built-in skin editor, a community download center to share saves, and guides for those who are new to emulation. It's easy to use and fun to play! Featuring: Cheat codes system: - Your favorite cheat codes are ready to go Incredibly compatible: - Try your favorite game and be amazed - We have the best game compatibility Graphically superior: - Renders at the highest resolution - Fullscreen stretch mode in landscape viewing - Widescreen options for 3D games - Beautiful controller skins supporting analog controls File support: - CUE+BIN support - CHD, PBP, ISO, and MDS - Multidisc support - 7zip, Zip, RAR, and ECM archives Cheat Codes: - Access all your cheat codes right in the game! Usability: - Screenshots to share the action - Memory card management - Help center with support if you're stuck Hardware Controller Support: - Supports your favorite console, PC bluetooth, and MFi game controllers. - Bluetooth & wired keyboards are also supported! - Analog sticks can be mapped to analog controls on games that support analog sticks! Sync: - Use your Google Drive or DropBox service to sync your files. - Automatically backs up your save states. Import options: - From your browser - From your device's storage that is also easily transferred to by AirDrop - From your desktop, just drag and drop Save States: - Save and load a game at any point. - Automatically save your progress. Controller Skins: - Comes with well-crafted portrait and landscape controllers. - Create your own controller skins. Game Cover Artwork: - Sets your game cover artwork to your titles. Thank you for 15 years of your support! * Gamma is in no way affiliated with Sony, Sony Interactive Entertainment Inc., Sony Corporation, Sony Group Corporation, PlayStation, or any of their products. Gamma is in no way affiliated with PPSSPP, Delta, Folium, and RetroArch. Sony is a registered trademark or trademark of Sony Group Corporation. PlayStation, PSone, and DUALSHOCK are registered trademarks or trademarks of Sony Interactive Entertainment Inc. * Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ * Privacy Policy and Gamma Service Terms: https://www.zodttd.com/gamma/policy/

About

Digi Invaders

Match numbers to destroy incoming invaders in this addictive arcade game. Experience classic LCD gaming with modern mobile gameplay, featuring 10 challenging levels and a high score system. Perfect for quick sessions and score competition.

Highlights
  • Number matching gameplay
  • 10 challenging levels
  • High score system
  • Customizable controls
  • Retro LCD display
  • No ads or IAPs
Features
Read full description

DIGI INVADERS Casio-style Digi Invaders — now with a real calculator and music. NEW • Full calculator mode — add, subtract, multiply, divide & more • Tune / Melody mode — play notes, demos, and record your own tunes • Authentic LCD glass display or classic green OG look • LCD brightness + Easy / Medium / Hard difficulty • Classic Digi Invaders gameplay with UFO bonus scoring Game, calculator, and melody machine — all in one.

Screenshots

Gamma4 screens
Digi Invaders3 screens

Verdict

The call

The clearest difference is price: Gamma at Free against Digi Invaders's $0.99. Gamma also leads on update cadence (every 5 days vs every 5 weeks) and iOS requirement (15.0 vs 18.1). Digi Invaders's advantage is in-app purchases (none vs 5) and ads (none vs shown). On 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

Gamma is free to download; Digi Invaders costs $0.99 up front. Gamma sells 5 in-app purchases, starting at $0.99 per month. Digi Invaders asks for nothing beyond the download.

UpkeepUpdate frequency

Gamma ships an update every 5 days, Digi Invaders every 5 weeks. The most recent releases landed on October 31, 2026 and October 15, 2026 respectively.

Scorecard7 real differences · 3 level
Gamma versus Digi Invaders: the parameters behind the verdict, then further details
ParameterGammaDigi Invaders
PriceFree — better$0.99
Rating4.8 (11K ratings) — better—
Positive reviews83.8% of reviews100.0% of reviews — better
Number of ratings11K — better—
Update frequencyEvery 5 days — betterEvery 5 weeks
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchases — betterPaid
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better18.1
Further details — not scored
Size150 MB4 MB
Age rating4+4+
DeveloperZODTTD LLCSimon Wolf

Customer experience

Gamma

All ratings10,559 ratings
Positive94.3%
Neutral1.6%
Negative4.0%
Written reviews3,090 reviews
Positive83.8%
Neutral5.0%
Negative11.2%

Digi Invaders

Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

Gamma

Reported bugs

3 issues
  • Crashes when customizing controls
  • Some games freeze or have graphical issues
  • Dropbox sync not working properly

Requested features

4 requests
  • Multiple controller support
  • Customizable button layouts
  • More display/graphics settings
  • Ability to load .cue files

Digi Invaders

Not enough reviews yet to summarise bugs or requests.

In-app purchases

5 purchases

Gamma

Subscriptions4
  • Great Supporter$0.991 Month
  • Fantastic Supporter$1.991 Month
  • Incredible Supporter$4.991 Month
Show 1 more
  • Greatest Supporter Of All Time$9.991 Month
One-time1
  • Gamma Pro - Remove Ads$4.99
None

Digi Invaders

No in-app purchases

Questions

Is Gamma free?
Gamma is free to download, with in-app purchases available.
Is Digi Invaders free?
Digi Invaders costs $0.99, with no in-app purchases.
Do Gamma or Digi Invaders have ads?
Gamma shows ads; Digi Invaders does not.
Which is updated more often, Gamma or Digi Invaders?
Gamma ships an update every 5 days, and Digi Invaders every 5 weeks. Most recently, Gamma was updated on October 31, 2026 and Digi Invaders on October 15, 2026.

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