This utility helps photographers determine precise exposure times when using ND filters. It also functions as a timer and trigger for compatible wireless remote controls.
BENRO Filter Calculator by Snoppa Technology Co., Ltd.



250+ iOS apps curated and reviewed
The best benro filter calculator apps on iPhone average 4.3★ across 250+ titles — we've ranked them by what real users actually keep on their phones. Updated September 2026.
| # | App | Price | Rating | Ads | In-App Purchases | Updated | |
|---|---|---|---|---|---|---|---|
| 1 | Free | — | No | No | May 2026 | ||
| 2 | Free | 2.6★ (5) | No | No | Aug 2026 | ||
| 3 | $0.99 | 1.8★ (22) | No | No | Jul 2026 | ||
| 4 | Free | 4.6★ (194) | Yes | No | Aug 2026 | ||
| 5 | Free | 4.4★ (25) | No | Yes | Sep 2026 | ||
| 6 | Free | — | No | Yes | Jun 2026 | ||
| 7 | Free | 5.0★ (3) | No | No | Sep 2026 | ||
| 8 | Free | 4.4★ (62) | Yes | Yes | May 2026 |








This utility helps photographers determine precise exposure times when using ND filters. It also functions as a timer and trigger for compatible wireless remote controls.





Securely hide private photos, documents, and other files behind a functional calculator interface. Access your hidden content by entering a password and shaking your device. Seamlessly import files from your camera roll or email attachments.