Comparison

Marolli Technical Dictionary vs Tolerance Helper

Price, ratings, monetisation and update history for both apps, side by side β€” with what reviewers say about each.

Head to head
About

Marolli Technical Dictionary

Features
Read full description

This new edition, updated to the latest scientific and technological knowledge, draws on the skills of professionals working in various fields as well as a large group of editors and lexicographers. With over 215,000 entries, it has become a classic complement to any general English-Italian-English dictionary. Alongside the terminology of classical disciplines, such as mechanics, physics, chemistry and construction theory, there are also terms found in computer science, telecommunications, energy industry and business management. The "methodical" approach allows the users to find the sub-entries of the headwords grouped based on the affinity criterion of their meanings, offering a comprehensive picture of the use of each headword. The app's interface has been redesigned to provide a simpler and more intuitive experience. You can swipe the definitions to the right to return to the search results and improve the readability by pinching the text with two fingers to zoom in and out. In addition, you can tap on any word within the definitions and look it up directly in the dictionary without having to type it into the search box. A main menu that can be activated via an icon available at the top right of the screen enables all the features of the app: β€’ Index search: displays in alphabetical order the headwords that match the characters typed in the search box β€’ Advanced search: lets you search for headwords, in the phraseology, and in full text β€’ Settings: allows you to choose the font size of the definitions and the language of the interface β€’ History: keeps a record of the searches performed β€’ Abbreviations: displays a table with an explanation of the abbreviations used within the definitions β€’ Feedback: use it to provide suggestions, and notify errors, missing entries or other comments β€’ Our apps: displays an updated and detailed catalog of our offer β€’ Privacy and Credits: view legal notices about the app Features β€’ Compatible with iOS 13.x and later versions β€’ Check for updates online and use of the dictionary offline β€’ User interface in Italian and English β€’ 215.000 headwords and definitions β€’ 140 search categories β€’ Systematic information regarding the sectors terms are used in β€’ Cross-references are highlighted and selectable within the definitions β€’ Wide repertoire of phraseology β€’ Clear graphic presentation and easy consultation β€’ Sharing the definitions using the features available in the device, such as social media, e-mail, SMS, etc. For any suggestions, feedback, and other information about our products, please contact us at apps@edigeo.it Follow us on our Facebook page at https://www.facebook.com/edigeosrl

About

Tolerance Helper

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.

Highlights
  • ISO tolerance calculations for holes and shafts
  • Complete engineering tolerance reference table
  • Minimum, maximum, and average dimension calculations
  • Multi-unit support (mm, inches, micrometers)
  • Powerful search and filtering of designations
  • User-friendly interface with color-coded indicators
  • Dark mode support
Features
Read full description

Tolerance Calculator Tolerance Calculator is a comprehensive engineering reference tool for mechanical design and precision manufacturing professionals. This app simplifies the process of calculating dimensions with ISO standard tolerances for both holes and shafts. Key Features Comprehensive Tolerance Reference Complete reference table of engineering tolerances Support for both hole and shaft designations (e.g., H7, h7) Spans all standard dimensional intervals Easy Tolerance Calculation Calculate minimum, maximum, and average dimensions Enter a nominal dimension and view all tolerance limits instantly Results displayed clearly with color-coded indicators Copy results to clipboard with a single tap Powerful Search and Filtering Quick search for specific tolerance designations Filter by hole or shaft tolerances Recent searches history for faster access Customizable tolerance filter to show only designations you need Multi-unit Support View tolerances in millimeters (mm) Convert to inches (in) with proper precision Convert to micrometers (ΞΌm) for precision work User-Friendly Interface Intuitive navigation with tolerance table Clean, engineering-focused design Clear color coding: blue for holes, green for shafts Clickable cells for instant calculations Accessibility Features Dark mode support for low-light environments Responsive layout for phones and tablets Support for both portrait and landscape orientations Localization English and Russian language support International engineering symbols Professionally translated interface Perfect For Mechanical engineers CNC machinists Manufacturing technicians Quality control specialists Engineering students Technical designers Precision fabricators Tolerance Calculator is the essential pocket reference for anyone working with precision mechanical parts. Calculate proper fits and clearances accurately without the need for paper tables or complex formulas. Download now and simplify your engineering calculations!

Screenshots

Marolli Technical Dictionary4 screens
Tolerance Helper4 screens

Verdict

The call

The clearest difference is price: Tolerance Helper at Free against Marolli Technical Dictionary's $22.99. Tolerance Helper also leads on update cadence (weekly vs every 10 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Tolerance Helper is free to download; Marolli Technical Dictionary costs $22.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Marolli Technical Dictionary ships an update every 10 months, Tolerance Helper weekly. The most recent releases landed on September 23, 2026 and October 12, 2026 respectively.

Scorecard2 real differences Β· 6 level
Marolli Technical Dictionary versus Tolerance Helper: the parameters behind the verdict, then further details
ParameterMarolli Technical DictionaryTolerance Helper
Price$22.99Free β€” better
Positive reviewsβ€”100.0% of reviews
Update frequencyEvery 10 monthsWeekly β€” better
AdsNoNo
In-app purchasesNoNo
Monetizationβ€”Free
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.015.0
Further details β€” not scored
Size22 MB21 MB
Age rating4+4+
DeveloperEdigeo S.r.l.Dmitriy Trofimov

In-app purchases

None

Marolli Technical Dictionary

No in-app purchases

None

Tolerance Helper

No in-app purchases

Questions

Is Marolli Technical Dictionary free?
Marolli Technical Dictionary costs $22.99, with no in-app purchases.
Is Tolerance Helper free?
Tolerance Helper is free to download, with no in-app purchases.
Do Marolli Technical Dictionary or Tolerance Helper have ads?
Neither Marolli Technical Dictionary nor Tolerance Helper shows ads.
Which is updated more often, Marolli Technical Dictionary or Tolerance Helper?
Marolli Technical Dictionary ships an update every 10 months, and Tolerance Helper weekly. Most recently, Marolli Technical Dictionary was updated on September 23, 2026 and Tolerance Helper on October 12, 2026.

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