250+ iOS apps curated and reviewed
Out of 250+ paragon crt apps on iOS, 20 are free and the rest sit in the paid tier. This page sorts them so you can compare both sides before you commit.
| # | App | Price | Rating | Ads | In-App Purchases | Updated | |
|---|---|---|---|---|---|---|---|
| 1 |  | Free | 5.0★ (5) | No | No | Oct 2026 | |
| 2 |  | Free | — | No | No | May 2026 | |
| 3 |  | Free | 4.9★ (143K) | No | No | Oct 2026 | |
| 4 |  | Free | 4.8★ (34K) | No | No | Oct 2026 | |
| 5 |  | Free | — | No | No | May 2026 | |
| 6 |  | Free | 4.7★ (49) | No | No | Oct 2026 | |
| 7 |  | Free | — | No | No | May 2026 | |
| 8 |  | Free | — | No | No | May 2026 |
This tool helps eye care professionals quickly and accurately calculate optimal CRT lenses for patients. It simplifies the fitting process, allowing for on-the-fly prescription evaluation and sharing of results. Designed for professional use, it aids in patient evaluation.
Easily renew your contact lens prescription with a quick in-app vision exam and order your lenses from the world's largest inventory. Get fast shipping and save with insurance benefits.
