Orifice Flow Rate Calculator vs OPTIC Mobile (Friendly Eagle)
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Orifice Flow Rate Calculator
Easily calculate natural gas orifice flow rates using the AGA 3 standard. This utility app allows users to determine MCF production for a given duration, save calculations, and export data to CSV. It functions offline, requiring no cell service.
- Orifice MCF Calculator
- Rotary (Direct) MCF Calculator
- Save all calculations
- View saved inputs and calculations
- Export calculations to CSV
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Looking to calculate orifice flow rates quickly and easily? R. L. Laughlin has a solution for you! With our Orifice Flow Rate Calculator, users are given the ability to determine orifice flow rates easily and quickly that does not require cell service to utilize the app. Orifice Flow Rate Calculator utilizes AGA 3 standard to calculate the MCF a single well is producing per day and for a given duration that you choose. Features: -Orifice MCF Calculator -Rotary (Direct) MCF Calculator -Ability to save all calculations -View all inputs and calculations saved for a given meter -Export all or individual saved calculations to a CSV file
OPTIC Mobile (Friendly Eagle)
Access and modify records from the OPTIC server on your mobile device. Create, delete, and update entries, with offline capabilities for data and documents. Sync changes back to the server when connected.
- View and update server records
- Create and delete new records
- Offline data access and saving
- Downloadable documents and SDS
- Customizable download settings
- Syncs with OPTIC Web application
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The mobile app allows retrieval of certain number of records from the OPTIC server to view and update them on the mobile device, then saving those records back to server. New records can be created and existing ones can be deleted as well. If a connection to the OPTIC server cannnot be established, saving is done on device - with the possibility of having them uploaded to server manually or automatically as soon as a connection to server is detected. The records operate with default or or custom layouts (templates), automatically downloaded from the server after a successful login. Documents ("Resources" section) can be downloaded to device for later viewing - while disconnected from the Internet - opening with the default device applications. Similar for SDS (Safety Data Sheet) documents. Please keep in mind that the more data downloaded, the longer the waiting time is going to be. Also, extra data charges may incur from your cell service provider - therefore it is strongly recommended to download while on WiFi, as much as possible. The SETTINGS section allows customization of the volume and frequency of the downloads, as well as resetting the app anytime - with deletion of all locally stored app data, in order to free up storage space. The app complements the OPTIC System Web application and its strongest asset is the ability to operate on records and locally downloaded documents while disconnected from the Internet. For the full set of features it is recommended to use the Web application. To log in, use the same Client ID, User Name and Password which you normally would use in the Web application.
Screenshots
Verdict
The clearest difference is update cadence: OPTIC Mobile (Friendly Eagle) at every 3 weeks against Orifice Flow Rate Calculator's every 6 months. OPTIC Mobile (Friendly Eagle) also leads on iOS requirement (12.2 vs 15.6). Orifice Flow Rate Calculator's advantage is ratings volume (98 vs 1). On price, rating, ads and in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
On the App Store both sit at effectively the same score — 4.9 for Orifice Flow Rate Calculator against 5.0 for OPTIC Mobile (Friendly Eagle). That said, the two scores are not equally well evidenced: Orifice Flow Rate Calculator has 98 ratings behind it against 1, so its average is the more settled of the two.
Orifice Flow Rate Calculator ships an update every 6 months, OPTIC Mobile (Friendly Eagle) every 3 weeks. The most recent releases landed on September 7, 2026 and September 8, 2026 respectively.
| Parameter | Orifice Flow Rate Calculator | OPTIC Mobile (Friendly Eagle) |
|---|---|---|
| Price | Free | Free |
| Rating | 4.9 (98 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 98 — better | 1 |
| Update frequency | Every 6 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.6 | 12.2 — better |
| Further details — not scored | ||
| Size | 2 MB | 70 MB |
| Age rating | 4+ | 4+ |
| Developer | R.L. Laughlin & Company, Inc. | FRIENDLY EAGLE SOFTWARE INC. |
Customer experience
Orifice Flow Rate Calculator
OPTIC Mobile (Friendly Eagle)
In-app purchases
Orifice Flow Rate Calculator
No in-app purchases
OPTIC Mobile (Friendly Eagle)
No in-app purchases
Questions
Is Orifice Flow Rate Calculator free?
Is OPTIC Mobile (Friendly Eagle) free?
Which has better reviews, Orifice Flow Rate Calculator or OPTIC Mobile (Friendly Eagle)?
Do Orifice Flow Rate Calculator or OPTIC Mobile (Friendly Eagle) have ads?
Which is updated more often, Orifice Flow Rate Calculator or OPTIC Mobile (Friendly Eagle)?
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