Fit Tolerance ISO vs mechanical design engine
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Fit Tolerance ISO
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.
- Calculates engineering tolerances
- Supports ISO and ANSI standards
- Determines clearance, transition, and interference fits
- Provides schematic fit representations
- Includes preferred tolerances and fits
- Works with metric units
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Limits, fits and tolerances calculator has been developed to calculate engineering tolerances of inner and outer features of journal bearings, linear bearings, thrust bearings, bushings, ball bearings, roller bearings, housings, cylinder bores, drilled holes, linear and precision shafts, pistons, etc. The calculator works in line with ISO 286-1 (2010), ISO 286-2 (2010) and ANSI B4.2 (1978) standards which are based on metric units. According to the input parameters of nominal size and hole/shaft tolerances, size limits and deviations for hole/shaft are calculated and fit type is selected among the clearance, transition and interference fits. The schematic representation of the fit is also drawn. The preferred tolerances and fits advised by ISO and ANSI standards can be found in the "Supplements" section.
mechanical design engine
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* To calculate basic thickness of cylindrical/rectangular pressure vessel including heads if input data such as pressure, temperature, inner diameter and material information. * flange data can be easily searched. * Profile steel information such as pipe, H, W, I and U-Beam. * Raw material information, that is chemical composition and mechanical properties, for example, ASTM A240 316L, EN10297-1, SUS316L and so on. * Size and shape information of every thread(iso/unf/pf/pt) and shackles(bow/d-type) * To calculate force and moment of solid mechanics according to support type.
Screenshots
Verdict
The clearest difference is ads: mechanical design engine at none against Fit Tolerance ISO's shown. mechanical design engine also leads on update cadence (every 2 months vs every 12 months) and iOS requirement (13.0 vs 15.0). On price, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Fit Tolerance ISO ships an update every 12 months, mechanical design engine every 2 months. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.
| Parameter | Fit Tolerance ISO | mechanical design engine |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) — better | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 12 months | Every 2 months — better |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | Ad-supported | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 51 MB | 63 MB |
| Age rating | 4+ | 4+ |
| Developer | Yasar Yucel Yesilbag | gan dae choi |
In-app purchases
Fit Tolerance ISO
No in-app purchases
mechanical design engine
No in-app purchases
Questions
Is Fit Tolerance ISO free?
Is mechanical design engine free?
Do Fit Tolerance ISO or mechanical design engine have ads?
Which is updated more often, Fit Tolerance ISO or mechanical design engine?
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