Eureka: Fast Sync for Ricoh GR

Content rating
Everyone
100+
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Content rating
Everyone
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About this app

Get photos off your Ricoh GR and onto your phone in seconds. Connect over Wi-Fi, browse thumbnails, download the ones you want.

Not for you? Request a refund from Google Play within 48 hours, no questions asked. Within 7 days, email me the order number from your Google receipt and I'll refund it.

FEATURES

- Remembers your camera. Turn on the GR's wireless LAN and Eureka connects with a single tap. Multiple cameras supported.
- Fast browsing. Thumbnails for JPEG and RAW (DNG) files load straight from the camera, so you can find the shot without downloading everything.
- One tap, or the whole shoot. Download a single photo or a batch. Transfers run in the background with progress in the notification shade.
- Survives dropped connections. If the camera sleeps or goes out of range mid-transfer, Eureka offers to pick up where it left off next time you connect.
- Remembers what you downloaded. Download all photos or just what's new after a shoot.
- Full-resolution viewer. Pinch, zoom and swipe at full quality before deciding what to keep.
- RAW support. DNG files land ready for Lightroom, Snapseed or whatever you edit in.

HOW IT WORKS

1. Turn on your camera's wireless LAN.
2. Open Eureka and tap your camera. It will scan and connect automatically.
3. Browse your photos and tap to download.

Downloads go to the Eureka folder under Pictures. To back them up to Google Photos, open that folder in Photos and turn on backup.

SUPPORTED CAMERAS

Ricoh GR II, GR III and GR IIIx, including the HDF editions.

PERMISSIONS AND PRIVACY

Android requires the location permission to scan for Wi-Fi networks. That is the only reason Eureka asks for it. The app never uses GPS, has no analytics, and sends nothing anywhere except between your phone and your camera.

ABOUT

Eureka is built and maintained by one GR shooter. Found a bug or want a feature? Email me. The app is actively developed and I love hearing from you.

Eureka is an independent app and is not affiliated with, endorsed by or supported by Ricoh Imaging. RICOH and GR are trademarks of Ricoh Company, Ltd.
Fast photo downloader for Ricoh GR II, III and IIIx. JPEG and RAW, no cloud.
Updated on
Oct 9, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
  • No data shared with third parties
    Learn more about how developers declare sharing
  • No data collected
    Learn more about how developers declare collection

What’s new

- Replaced the photo-format selector with filter chips
- Improved connection retries
- Fixed scanning after granting location permission and stuck scans when Location is off
- Preserve the camera’s transfer queue when viewing full-res photos
- Cache viewed photos and reuse completed transfers
- Fix incomplete GR II photo listings and missing thumbnails