Linear Interpolation Master vs ROIs Crew
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Linear Interpolation Master
This tool simplifies linear interpolation calculations for industrial commissioning engineers. It features large, easily readable numbers for field use and allows for quick swapping of coordinate systems, such as converting between 4-20mA and 0-100% scales.
- Large number display for field visibility
- Quickly swap X and Y coordinates
- 4-20mA to 0-100% conversion
- 0-100% to 4-20mA conversion
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A linear interpolation calculator designed for industrial commissioning engineers. It has the following features: - Displays large numbers for when you are out in the field commissioning. - Allows quickly swapping x and y coordinates; for example from 4-20mA -> 0-100% to 0-100% -> 4-20mA.
ROIs Crew
Manage your flight schedule, track performance metrics, and update qualifications. Receive alerts for travel documents and log post-flight reports. Stay informed about roster and flight changes with real-time notifications.
- View personal rosters and flight details
- Track duty hours and block times
- Receive travel document expiry alerts
- Log post-flight reports
- Real-time notifications on roster/flight changes
- Update crew qualifications & contacts
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It provides the following key features: View personal rosters and flight details including hotel, transport info Track key performance metrics like duty hours and block times Receive travel document expiry alerts, update crew qualifications & contacts Log post-flight reports with on-seat, take-off/landing details Get real-time notifications on roster/flight changes for proactive adjustments The app empowers crew to stay updated on their schedule, provide feedback, and communicate efficiently with their companies. Its user-friendly interface offers seamless support for crew operations.
Screenshots
Verdict
The clearest difference is review sentiment: Linear Interpolation Master at 63% against ROIs Crew's 0%. Linear Interpolation Master also leads on iOS requirement (11.0 vs 13.0). ROIs Crew's advantage is in-app purchases (none vs 3) and ads (none vs shown). 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. Linear Interpolation Master sells 3 one-off in-app purchases. ROIs Crew asks for nothing beyond the download.
Linear Interpolation Master ships an update every 5 months, ROIs Crew every 2 months. The most recent releases landed on September 27, 2026 and September 21, 2026 respectively.
| Parameter | Linear Interpolation Master | ROIs Crew |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (176 ratings) — better | — |
| Positive reviews | 62.5% of reviews — better | 0.0% of reviews |
| Number of ratings | 176 — better | — |
| Update frequency | Every 5 months | Every 2 months — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 11.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 16 MB | 49 MB |
| Age rating | 4+ | 4+ |
| Developer | VERVE TECHNOLOGIES PTY. LTD. | HangZhou Pi-Solution Information Technology Co.,Ltd |
Customer experience
Linear Interpolation Master
ROIs Crew
In-app purchases
Linear Interpolation Master
- Generous Tip$2.99
- Massive Tip$3.99
- Amazing Tip$4.99
ROIs Crew
No in-app purchases
Questions
Is Linear Interpolation Master free?
Is ROIs Crew free?
Do Linear Interpolation Master or ROIs Crew have ads?
Which is updated more often, Linear Interpolation Master or ROIs Crew?
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