245+ iOS apps curated and reviewed
The best stair stringer calculator pro apps on iPhone average 4.4★ across 245+ titles — we've ranked them by what real users actually keep on their phones. Updated October 2026.
| # | App | Price | Rating | Ads | In-App Purchases | Updated | |
|---|---|---|---|---|---|---|---|
| 1 |  | Free | — | No | Yes | Oct 2026 | |
| 2 |  | $1.99 | 4.7★ (86) | No | No | Oct 2026 | |
| 3 |  | Free | 4.0★ (4) | No | Yes | Oct 2026 | |
| 4 |  | Free | — | Yes | Yes | Sep 2026 | |
| 5 |  | Free | 5.0★ (3) | No | Yes | Sep 2026 | |
| 6 |  | Free | 4.2★ (44) | Yes | Yes | Oct 2026 | |
| 7 |  | Free | — | No | Yes | Oct 2026 | |
| 8 |  | Free | — | Yes | Yes | Jul 2026 |
This app calculates all necessary measurements for building a stair stringer, including risers, run, angle, and length. Easily adjust parameters and switch between Imperial and Metric units. Share your calculated results via email or text.
This app quickly calculates stair dimensions like number of steps, total run, and stringer measurements. It supports real-time unit conversions between imperial and metric systems and includes a currency converter. Premium features require a subscription.
