OTT25 vs GammaWave
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
OTT25
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The app has various functions. You can access news and information about participants and the program. There is also a game, a clock, etc.
GammaWave
Play classic console and handheld games with this high-performance emulator. It offers fast load times, responsive controls, and a clean interface. Bring your own game files and enjoy a seamless retro gaming experience.
- High-performance emulation
- Save states with thumbnails
- Fast-forward and slow-motion
- Customizable touch controls
- Optional cloud sync
- Ad-free experience
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GammaWave is a premium, lightweight emulator for classic games, built for speed and a clean, modern experience. One app for your favorite handhelds and home consoles, powered by trusted, accurate open-source cores. Bring your own game files and play instantly. GammaWave focuses on doing the essentials brilliantly: fast load times, responsive controls, and an interface that gets out of your way. SUPPORTED SYSTEMS - Game Boy and Game Boy Color - Game Boy Advance - Nintendo DS - NES - Super Nintendo (SNES) - Nintendo 64 - Sega Genesis and Mega Drive - Sega Master System - Sega Game Gear FEATURES - High-performance, accurate emulation across every system - Save states: save and resume anywhere, with preview thumbnails - Fast-forward and slow-motion for grinding or tricky sections - Import and export your battery save files - Fully customizable on-screen touch controls - Portrait and landscape play, edge to edge - Custom controller skins to make it yours - Optional Google Drive cloud sync: back up and restore your saves across devices, game by game - Organize your collection into folders, with instant search - Clean, fast, and completely ad-free PRIVACY AND OWNERSHIP GammaWave does not include, host, or distribute any games. You supply your own game files, and they stay private on your device. Cloud sync is optional and backs up only to your own Google Drive. Built by a solo developer who loves classic games. Feedback is always welcome. Thanks for trying GammaWave!
Screenshots
Verdict
The clearest difference is iOS requirement: OTT25 at 12.0 against GammaWave's 15.0. On price, 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | OTT25 | GammaWave |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (4 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 4 — better |
| Update frequency | — | Every 4 days |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 36 MB | 98 MB |
| Age rating | 17+ | 4+ |
| Developer | Stefan Kessler | Priya Goel |
In-app purchases
OTT25
No in-app purchases
GammaWave
No in-app purchases
