# FORScan Viewer vs DrillOut Calcs

The clearest difference is review sentiment: DrillOut Calcs at 100% against FORScan Viewer's 32%. DrillOut Calcs also leads on rating (5.0 vs 2.7) and update cadence (every 3 weeks vs every 3 months). FORScan Viewer's advantage is ratings volume (105 vs 2) and iOS requirement (9.0 vs 18.5). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

DrillOut Calcs holds the better App Store score, 5.0 against 2.7. That said, the two scores are not equally well evidenced: FORScan Viewer has 105 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 32% of FORScan Viewer's written reviews are positive against 100% of DrillOut Calcs's.

FORScan Viewer ships an update every 3 months, DrillOut Calcs every 3 weeks. The most recent releases landed on November 11, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | FORScan Viewer | DrillOut Calcs |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.7 (105 ratings)](https://appshunter.io/ios/app/forscan-viewer/id1344642568/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/drillout-calcs/id6754534235/reviews)** |
| Number of ratings | **105** | 2 |
| Positive reviews | 31.6% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Monetization | Free | Free |
| Size | 80 MB | 3 MB |
| Requires iOS | **9.0** | 18.5 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Aleksei Savin](https://appshunter.io/developer/892347086) | [Cody Martin](https://appshunter.io/developer/1796736420) |

## What reviewers say

### FORScan Viewer

[App page](https://appshunter.io/ios/app/forscan-viewer/id1344642568)

This application allows users to read and view information about the on-board network of Ford, Mazda, Lincoln, and Mercury vehicles. It supports various OBD adapters and displays diagnostic trouble codes for all modules.

**Highlights:** Read vehicle on-board network configuration, View Diagnostic Trouble Codes (DTC), Supports Ford, Mazda, Lincoln, Mercury vehicles, Compatible with OBDLink MX+, vLinker adapters, Displays module information

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 🚀 Comprehensive real-time sensor monitoring and data recording
- 📊 Detailed error code viewing and analysis capabilities
- ⚙️ Extensive vehicle customization and performance settings
- ✅ Works excellently with quality OBD2 adapters
- 🔧 Superior diagnostics compared to competing apps

**What reviewers complain about**

- 🐛 Frequent Bluetooth connectivity failures
- 🐛 WiFi connection issues and instability
- ❌ Incompatible with many popular OBD2 adapters
- 📱 iOS version severely limited compared to Windows
- ⚠️ Error codes fail to clear properly

**Reported bugs**

- App fails to detect OBD2 adapters despite successful pairing
- Bluetooth connection drops and fails to reconnect
- WiFi adapter detection not working after updates
- Error code clearing functionality non-functional
- Vehicle identification fails on certain models

**Requested features**

- Bluetooth Low Energy (BLE) adapter support
- Full feature parity between iOS and Windows versions
- Turkish language support
- Improved UI scaling for modern iPhones
- Expanded vehicle compatibility


### DrillOut Calcs

[App page](https://appshunter.io/ios/app/drillout-calcs/id6754534235)

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.

**Highlights:** Post-frac plug drill-out calculations, Flow balance verification, Annular velocity calculation, Sweep efficiency assessment, Surface return timing, Real-time data verification

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is FORScan Viewer free?

FORScan Viewer is free to download, with no in-app purchases.

### Is DrillOut Calcs free?

DrillOut Calcs is free to download, with no in-app purchases.

### Which has better reviews, FORScan Viewer or DrillOut Calcs?

DrillOut Calcs is rated higher. FORScan Viewer averages 2.7 out of 5 from 105 ratings, while DrillOut Calcs averages 5.0 from 2 ratings.

### Do FORScan Viewer or DrillOut Calcs have ads?

Neither FORScan Viewer nor DrillOut Calcs shows ads.

### Which is updated more often, FORScan Viewer or DrillOut Calcs?

FORScan Viewer ships an update every 3 months, and DrillOut Calcs every 3 weeks. Most recently, FORScan Viewer was updated on November 11, 2026 and DrillOut Calcs on November 5, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*