Time.Calc vs OneStop Pro®
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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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
OneStop Pro®
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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
Verdict
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
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.
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.
| Parameter | Time.Calc | OneStop Pro® |
|---|---|---|
| Price | $1.99 | Free — better |
| Rating | 4.9 (228 ratings) — better | — |
| Positive reviews | 81.2% of reviews | — |
| Number of ratings | 228 — better | — |
| Update frequency | Every 4 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 11.0 — better | 15.1 |
| Further details — not scored | ||
| Size | 1 MB | 63 MB |
| Age rating | 4+ | 4+ |
| Developer | Baliza GmbH | OneStop 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
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- 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
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- 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
Time.Calc
No in-app purchases
OneStop Pro®
No in-app purchases









