TLV ToolBox vs Fit Tolerance ISO
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
TLV ToolBox
This utility app transforms your mobile device into a portable steam calculation tool. It assists with onsite calculations for control valve stations, condensate recovery systems, and various maintenance tasks, reducing the need for multiple trips.
- Steam Tables (saturated and superheated)
- Steam Pipe Sizing
- Condensate Pipe Sizing
- Heating Calculations
- Cv and Kv Values
- Stall Point
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Turn your mobile device into a light & portable steam calculation tool with TLV Toolbox. Reduce trips back and forth while working onsite with this valuable tool. Helpful for design or everyday maintenance of control valve stations, condensate recovery systems, and much more! ************************* FEATURES: - Steam Tables (saturated and superheated) - Steam Pipe Sizing - Condensate Pipe Sizing - Heating Calculations - Cv and Kv Values - Stall Point - and more... ************************* * About Us * TLV is internationally established, with companies in 13 countries. A network of over 100 distributors in more than 50 countries enables the speedy provision of engineering support throughout the world. TLV plays a leading role in the promotion of efficient energy systems and increased environmental conservation on a worldwide scale through its original products and services. For further information visit: www.tlv.com Contact us: https://www.tlv.com/global/US/contact-us/contact-form.html
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.
Screenshots
Verdict
The clearest difference is rating: Fit Tolerance ISO at 5.0 against TLV ToolBox's 4.5. TLV ToolBox's advantage is ads (none vs shown) and update cadence (every 4 months vs every 12 months). 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 holds the better App Store score, 5.0 against 4.5. Both are backed by a comparable volume of ratings — 8 and 2 respectively.
TLV ToolBox ships an update every 4 months, Fit Tolerance ISO every 12 months. The most recent releases landed on November 6, 2026 and November 2, 2026 respectively.
| Parameter | TLV ToolBox | Fit Tolerance ISO |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (8 ratings) | 5.0 (2 ratings) — better |
| Positive reviews | 75.0% of reviews | — |
| Number of ratings | 8 — better | 2 |
| Update frequency | Every 4 months — better | Every 12 months |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Free — better | Ad-supported |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 9.3 — better | 15.0 |
| Further details — not scored | ||
| Size | 4 MB | 51 MB |
| Age rating | 4+ | 4+ |
| Developer | TLV CO.,LTD. | Yasar Yucel Yesilbag |
Customer experience
TLV ToolBox
Fit Tolerance ISO
In-app purchases
TLV ToolBox
No in-app purchases
Fit Tolerance ISO
No in-app purchases
Questions
Is TLV ToolBox free?
Is Fit Tolerance ISO free?
Which has better reviews, TLV ToolBox or Fit Tolerance ISO?
Do TLV ToolBox or Fit Tolerance ISO have ads?
Which is updated more often, TLV ToolBox or Fit Tolerance ISO?
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