# iEngineer vs Flange Bolt Size & Torque

The clearest difference is update cadence: Flange Bolt Size & Torque at monthly against iEngineer's every 5 months. iEngineer's advantage is review sentiment (86% vs 64%) and iOS requirement (9.3 vs 15.1). On price, rating, ratings volume and ads there is nothing between them.

Both are free to download. iEngineer sells 1 one-off in-app purchase and Flange Bolt Size & Torque sells 2 in-app purchases, starting at $4.99 per 3 months. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.6 for iEngineer against 4.6 for Flange Bolt Size & Torque. Both are backed by a comparable volume of ratings — 196 and 363 respectively. Written reviews are what separate them: 86% of iEngineer's written reviews are positive against 64% of Flange Bolt Size & Torque's.

iEngineer ships an update every 5 months, Flange Bolt Size & Torque monthly. The most recent releases landed on September 4, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | iEngineer | Flange Bolt Size & Torque |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (196 ratings)](https://appshunter.io/ios/app/iengineer/id369825047/reviews) | [4.6 (363 ratings)](https://appshunter.io/ios/app/flange-bolt-size-and-torque/id1489122965/reviews) |
| Number of ratings | 196 | **363** |
| Positive reviews | **85.5% of reviews** | 63.6% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Monthly** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 27 MB | 31 MB |
| Requires iOS | **9.3** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Perfectly Simple Apps LLC](https://appshunter.io/developer/357604157) | [Open Source Consulting LLC](https://appshunter.io/developer/1222335487) |

## What reviewers say

### iEngineer

[App page](https://appshunter.io/ios/app/iengineer/id369825047)

Access a vast database of screw and bolt information, including dimensions, material grades, and strength properties for both US and metric fasteners. Features a comprehensive drill chart, unit conversion, and customizable material displays.

**Highlights:** Extensive US screw database, Metric screw database (in-app purchase), Detailed dimensions and material grades, Strength, torque, and clamp force data, Head markings and 3D head models, Comprehensive drill chart, Unit conversion and data export

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Metric Screws | $1.99 | one-time |

**What reviewers like**

- 🚀 Easy to navigate
- 👍 Comprehensive information
- 🔧 Useful for everyday work
- ⚙️ Essential for engineers and machinists
- 💡 Saves time compared to physical references

**What reviewers complain about**

- 🐛 Occasional errors in torque and tensile strength data
- 💰 Metric information requires paid upgrade
- 🔍 Missing some thread types like NPT and BSPP

**Reported bugs**

- Metric portion not working for some users
- Camera access request for no apparent reason

**Requested features**

- Add tap drill chart
- Include clearance hole fits
- Improve UI for larger displays
- Add French language support


### Flange Bolt Size & Torque

[App page](https://appshunter.io/ios/app/flange-bolt-size-and-torque/id1489122965)

Instantly access flange, pipe, and bolt data offline. Quickly find bolt sizes, torque patterns, flange dimensions, and pipe specifications. Ideal for pipefitters and steamfitters needing rapid access to piping information.

**Highlights:** Offline data access, Instant data lookups, Flange bolting data, Flange dimensions data, Pipe data, Gasket data, Torque pattern images

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Flange Bolt Professional | $4.99 | per 3 months |
| Suggested Torque | $0.99 | one-time |

**What reviewers like**

- 👍 Easy to use
- 🚀 Huge time saver
- ✅ Reliable data
- 🛠️ Very helpful tool
- 💡 Useful for trade/craft

**What reviewers complain about**

- 💸 Now charges for features
- 👎 Used to be better
- 📉 Functionality decreased after redesign
- ❌ Missing Code 61/62 flange info
- 💰 Subscription model disliked

**Reported bugs**

- App stopped working, requires resubscription
- App will not open after latest update
- App is broken
- Black screen and grey bar in the middle
- Wrench sizes don't match up on some flanges

**Requested features**

- Add Code 61/62 flange information
- Include machined bolt sizes
- Add torquing equipment info (rad guns, J gun, etc.) and usage instructions
- Include CGI and CG torque specs for different gasket styles
- Add support for larger flange sizes (beyond 60")


## Frequently asked questions

### Is iEngineer free?

iEngineer is free to download, with in-app purchases available.

### Is Flange Bolt Size & Torque free?

Flange Bolt Size & Torque is free to download, with in-app purchases available.

### Which has better reviews, iEngineer or Flange Bolt Size & Torque?

iEngineer and Flange Bolt Size & Torque are both rated 4.6 out of 5 on the App Store, from 196 and 363 ratings respectively.

### Do iEngineer or Flange Bolt Size & Torque have ads?

Neither iEngineer nor Flange Bolt Size & Torque shows ads.

### Which is updated more often, iEngineer or Flange Bolt Size & Torque?

iEngineer ships an update every 5 months, and Flange Bolt Size & Torque monthly. Most recently, iEngineer was updated on September 4, 2026 and Flange Bolt Size & Torque on September 24, 2026.

---

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