# Compare Flow vs iHP48

Compare Flow and iHP48 both sit at 4.6 stars, but that hides the real split: 88% of iHP48's written reviews are positive against 50% of Compare Flow's. iHP48 also leads on update cadence (monthly vs every 32 months) and ratings volume (302 vs 5). On price, rating, ads and in-app purchases there is nothing between them.

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 — 4.6 for Compare Flow against 4.6 for iHP48. That said, the two scores are not equally well evidenced: iHP48 has 302 ratings behind it against 5, so its average is the more settled of the two. Written reviews are what separate them: 50% of Compare Flow's written reviews are positive against 88% of iHP48's.

Compare Flow ships an update every 32 months, iHP48 monthly. The most recent releases landed on October 29, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Compare Flow | iHP48 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (5 ratings)](https://appshunter.io/ios/app/compare-flow/id581217854/reviews) | **[4.6 (302 ratings)](https://appshunter.io/ios/app/ihp48/id1549608953/reviews)** |
| Number of ratings | 5 | **302** |
| Positive reviews | 50.0% of reviews | **88.3% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 32 months | **Monthly** |
| Monetization | Free | Free |
| Size | 23 MB | 6 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [iENGINEERING Corporation](https://appshunter.io/developer/419618955) | [Alexis Lorca](https://appshunter.io/developer/1549608955) |

## What reviewers say

### Compare Flow

[App page](https://appshunter.io/ios/app/compare-flow/id581217854)

This application helps engineers and designers evaluate the hydraulic flow capacity of various non-pressure sewer pipe types. It allows for comparisons between different pipe geometries and materials, including concrete, thermoplastic, and metal options.

**Highlights:** Manning's Formula calculation, Compare hydraulic flow capacity, Evaluate pipe geometry alternatives, Compare pipe material options, Supports concrete, thermoplastic, and metal pipes, Circular, elliptical, arch, and box sections

**Features:** macOS Compatibility

**In-app purchases:** none


### iHP48

[App page](https://appshunter.io/ios/app/ihp48/id1549608953)

This app brings the powerful HP48 calculator experience to your mobile device. It offers enhanced performance, seamless file management, and a customizable interface with support for various HP calculator models. Enjoy a familiar and convenient calculator solution without needing extra hardware.

**Highlights:** Supports HP38, HP39, HP48, HP49, HP50 calculators, Haptic feedback and customizable zoom options, Seamless file transfer via iTunes and Files app, Cloud storage integration (iCloud, OneDrive, Dropbox), Object saving/loading and copy/paste functionality, Access to calculator packages, skins, and ROMs, Internal file manager and extensible settings

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 🚀 Excellent emulation of HP48
- 👍 Familiar and nostalgic feel
- 👍 Comprehensive functionality
- 👍 Customizable skins
- 👍 Haptic feedback

**What reviewers complain about**

- 🐛 Occasional crashes or freezes
- 🐛 Missed keystrokes when typing quickly
- 🐛 Blank or flickering display
- 🐛 Compatibility issues with newer iOS versions

**Reported bugs**

- Crashes on startup
- Inability to save state across sessions
- Incompatibility with certain iOS devices

**Requested features**

- Dark mode option
- Ability to disable haptic feedback
- Support for HP50G emulation
- Improved keyboard mapping and arrow key functionality


## Frequently asked questions

### Is Compare Flow free?

Compare Flow is free to download, with no in-app purchases.

### Is iHP48 free?

iHP48 is free to download, with no in-app purchases.

### Which has better reviews, Compare Flow or iHP48?

iHP48 is rated higher. Compare Flow averages 4.6 out of 5 from 5 ratings, while iHP48 averages 4.6 from 302 ratings.

### Do Compare Flow or iHP48 have ads?

Neither Compare Flow nor iHP48 shows ads.

### Which is updated more often, Compare Flow or iHP48?

Compare Flow ships an update every 32 months, and iHP48 monthly. Most recently, Compare Flow was updated on October 29, 2026 and iHP48 on October 24, 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.*