4+ iOS apps curated and reviewed
If you already know GD&T, this is the deeper bench. 4+ toleranbearingtools apps for iPhone, all reviewed and ranked by user rating, recency, and download trend as of June 2026.
| # | App | Price | Rating | Ads | In-App Purchases | Updated | |
|---|---|---|---|---|---|---|---|
| 1 |  | Free | — | No | No | May 2026 | |
| 2 |  | Free | 5.0★ (2) | Yes | No | Aug 2026 | |
| 3 |  | Free | — | No | No | Sep 2026 | |
| 4 |  | $2.99 | 5.0★ (5) | No | No | Sep 2026 |
Calculates engineering tolerances for various mechanical components based on ISO and ANSI standards. It determines size limits, deviations, and fit types for holes and shafts, offering schematic representations of fits.
This engineering reference tool simplifies calculating ISO standard tolerances for mechanical design and manufacturing. It provides instant calculations for hole and shaft dimensions, with support for multiple units and a user-friendly interface.