Comparison

Time.Calc vs OneStop Pro®

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

Head to head
About

Time.Calc

This app simplifies complex time calculations with an intuitive interface. It supports both 24-hour and am/pm formats, making it ideal for managing flight logs, working hours, and general time-based tasks. Calculations can be easily shared or saved.

Highlights
  • Calculate duration between two times
  • Add and subtract durations
  • Flexible time unit input (hours, minutes, seconds)
  • Configurable rounding options
  • Support for negative values
  • Email calculations or save to calendar
Read full description

Time.Calc is the perfect tool to work with time! Its intuitive user interface makes even complicated time calculations simple. Both 24h and am/pm are supported. Especially the data in flight logs can be handled easily. Time.Calc also includes a convenient way to calculate working hours. This is perfect for employees, students, or freelancers. Features: - Calculate the duration between two points of time - Add and subtract durations - Flexible design: you can work with only hours and minutes for work time but include seconds whenever you want - Tap sounds for all buttons (can be switched off) - Configurable rounding options: Results can be rounded up to a variety of different intervals. Useful, if you bill for every hour commenced. - Supports negative values as input parameter and result - mail your calculations or save them to the internal calendar - iPad version with convenient protocol of previous calculations

About

OneStop Pro®

Features
Read full description

OneStop Pro® is a multi-award-winning construction software for the brand and manufacturer-independent management, scheduling and evaluation of all machines, equipment, vehicles and people. In combination with the desktop application, the OneStop Pro app offers the following functions in particular: - Machine and equipment management: a) Registration of new equipment (incl. documents and pictures) b) Viewing machine and equipment data (general data, description, technical data, timeline, location, documents and images) c) Digital machine and equipment file: Adding pictures and documents to machines/devices. d) Capture of operating hours e) Capture of mileage f) Identifying machines/equipment via QR code scan - Deployment of resources and bulk items: Transfer of machines, equipment as well as consumables and supplies - Damage management: capture of damage (incl. documents and pictures) - Maintenance and inspection management: overview of due maintenance and inspections Daily workflows are simplified and can be completed more quickly. The bundling of all information in one system enables 100 % transparency and overview. The user works with a single system (OneStop Pro) and thus gains the benefit of full transparency and a complete overview. Thanks to its broad functional scope, OneStop Pro has a product to suit every customer and every set of circumstances. OneStop Pro offers four different products: Go!, Telematics, Business and All-Inclusive. GO!, the entry-level product, offers the basic set of functions, such as a brand- and manufacturer-independent overview of all machines, tools and vehicles. It also enables you to manage maintenance appointments and inspections digitally. TELEMATICS provides a coherent overview of locations, live information and the movements of all machines and tools. Existing and new telematics and manufacturer information can be displayed at the touch of a button. BUSINESS enables OneStop Pro customers to digitally deploy and schedule resources, monitor costs and carry out evaluations. ALL-INCLUSIVE does the lot, as you might expect, combining the functions of all the OneStop Pro products in a single application.

Screenshots

Time.Calc4 screens
OneStop Pro®4 screens

Verdict

The call

The clearest difference is price: OneStop Pro® at Free against Time.Calc's $1.99. OneStop Pro® also leads on update cadence (every 3 weeks vs every 4 months). Time.Calc's advantage is iOS requirement (11.0 vs 15.1). On ads, 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

CostPrice · In-app purchases · Ads · Monetization

OneStop Pro® is free to download; Time.Calc costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Time.Calc ships an update every 4 months, OneStop Pro® every 3 weeks. The most recent releases landed on October 16, 2026 and October 6, 2026 respectively.

Scorecard3 real differences · 7 level
Time.Calc versus OneStop Pro®: the parameters behind the verdict, then further details
ParameterTime.CalcOneStop Pro®
Price$1.99Free — better
Rating4.9 (228 ratings) — better—
Positive reviews81.2% of reviews—
Number of ratings228 — better—
Update frequencyEvery 4 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS11.0 — better15.1
Further details — not scored
Size1 MB63 MB
Age rating4+4+
DeveloperBaliza GmbHOneStop Pro®

Bugs and requests

Time.Calc

Reported bugs

7 issues
  • Calculations become inaccurate after a while
  • Decimal to normal time conversion does not work
  • Inputting 19:47 rounds down to 19:00
  • App crashes
  • Calculations are off by two minutes
Show 2 more
  • New design is disliked by many users
  • Fuzzy text on specific devices

Requested features

16 requests
  • Add multiplication and division buttons
  • Add multiplication function
  • Add divide function
  • Add (X) option for multiplication
  • Add dual screen option
Show 11 more
  • Convert total hours to minutes
  • Add frame counter for film/TV work
  • Add option to save workdays
  • Add ability to see complete monthly sum
  • Improve calculation for work hours (e.g., 7.80)
  • Calculate non-sell on time work/break page
  • UI polish
  • Calculate hourly rate against calculated time
  • Add days off calculation
  • Allow choice between new and old design
  • Make screen usage more efficient for larger fingers

OneStop Pro®

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Time.Calc

No in-app purchases

None

OneStop Pro®

No in-app purchases

Questions

Is Time.Calc free?
Time.Calc costs $1.99, with no in-app purchases.
Is OneStop Pro® free?
OneStop Pro® is free to download, with no in-app purchases.
Do Time.Calc or OneStop Pro® have ads?
Neither Time.Calc nor OneStop Pro® shows ads.
Which is updated more often, Time.Calc or OneStop Pro®?
Time.Calc ships an update every 4 months, and OneStop Pro® every 3 weeks. Most recently, Time.Calc was updated on October 16, 2026 and OneStop Pro® on October 6, 2026.

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