Time Calculator × vs DrillOut Calcs
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Time Calculator ×
Effortlessly perform calculations with time values like addition, subtraction, multiplication, and division. Supports various time formats including days, hours, minutes, and seconds. Features a user-friendly interface for simple and functional time arithmetic.
- Time addition and subtraction
- Time multiplication and division
- Support for days, hours, minutes, seconds
- Flexible time format input/display
- User-friendly interface
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Introducing the upgraded Time Calculator app – your ultimate tool for seamless time-based calculations! Time Arithmetic Made Easy: Perform mathematical operations with time values like addition, subtraction, multiplication, division and more. No more struggling with complex time conversions – let our app handle the math for you. Flexible Time Formats: Input and display time values in various formats, including days, hours, minutes, and seconds. Customize the format that suits your preference or matches your specific needs. User-Friendly Interface: Designed for both simplicity and functionality, modelled after the native iPhone calculator, our app ensures a smooth user experience, regardless of your familiarity with time-based calculations. You can perform calculations such as: 1h 45m + 3h 20m 2h 38m x 2 8h - 1h 11m 14h ÷ 4 Terms of Use: https://doubleuapp.com/privacy/terms.html
DrillOut Calcs
This app offers essential calculations for oilfield professionals performing post-frac plug drill-outs. It provides quick and accurate tools to verify flow balance, annular velocity, sweep efficiency, and surface return timing in real time, designed for simplicity and speed.
- Post-frac plug drill-out calculations
- Flow balance verification
- Annular velocity calculation
- Sweep efficiency assessment
- Surface return timing
- Real-time data verification
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Drill-Out Calculator provides quick, accurate tools for oilfield professionals performing post-frac plug drill-outs. Built for simplicity and speed, it helps verify flow balance, annular velocity, sweep efficiency, and surface return timing in real time.
Screenshots
Verdict
The clearest difference is in-app purchases: DrillOut Calcs at none against Time Calculator ×'s 4. DrillOut Calcs also leads on ads (none vs shown) and update cadence (every 3 weeks vs every 6 months). Time Calculator ×'s advantage is ratings volume (287 vs 2) and iOS requirement (15.6 vs 18.5). On price 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. Time Calculator × sells 4 in-app purchases, starting at $4.99 per year. DrillOut Calcs asks for nothing beyond the download.
DrillOut Calcs holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Time Calculator × has 287 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 73% of Time Calculator ×'s written reviews are positive against 100% of DrillOut Calcs's.
Time Calculator × ships an update every 6 months, DrillOut Calcs every 3 weeks. The most recent releases landed on November 2, 2026 and November 5, 2026 respectively.
| Parameter | Time Calculator × | DrillOut Calcs |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (287 ratings) | 5.0 (2 ratings) — better |
| Positive reviews | 73.1% of reviews | 100.0% of reviews — better |
| Number of ratings | 287 — better | 2 |
| Update frequency | Every 6 months | Every 3 weeks — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.6 — better | 18.5 |
| Further details — not scored | ||
| Size | 28 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | DOUBLE U s.r.o. | Cody Martin |
Customer experience
Time Calculator ×
DrillOut Calcs
Bugs and requests
Time Calculator ×
Reported bugs
4 issues- Paid subscription, but ads still appear
- App defaults to D-H-M format, which is not preferred
- Calculation error: 3:64 should be 4:04
- Subtraction calculation error: 12:15pm from 6:45pm gives wrong answer
Requested features
2 requests- Make it pure hours and minutes, not days
- Option to disable 'DAYS' format
DrillOut Calcs
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Time Calculator ×
- Premium Yearly$4.991 Year
- Remove Ads$6.99
- Remove Ads$9.99
- Remove Ads$19.99
DrillOut Calcs
No in-app purchases
Questions
Is Time Calculator × free?
Is DrillOut Calcs free?
Which has better reviews, Time Calculator × or DrillOut Calcs?
Do Time Calculator × or DrillOut Calcs have ads?
Which is updated more often, Time Calculator × or DrillOut Calcs?
Other comparisons
