# iManifoldCR vs Appion Central

The clearest difference is rating: iManifoldCR at 3.8 against Appion Central's 2.8. iManifoldCR also leads on review sentiment (50% vs 29%) and iOS requirement (9.0 vs 13.0). On price, ratings volume, update cadence and ads there is nothing between them.

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

iManifoldCR holds the better App Store score, 3.8 against 2.8. Both are backed by a comparable volume of ratings — 11 and 14 respectively. Written reviews point the same way: 50% of iManifoldCR's written reviews are positive against 29% of Appion Central's.

iManifoldCR ships an update every 2 months, Appion Central every 5 weeks. The most recent releases landed on October 24, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | iManifoldCR | Appion Central |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.8 (11 ratings)](https://appshunter.io/ios/app/imanifoldcr/id1394856536/reviews)** | [2.8 (14 ratings)](https://appshunter.io/ios/app/appion-central/id1455230837/reviews) |
| Number of ratings | 11 | **14** |
| Positive reviews | **50.0% of reviews** | 28.6% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 5 weeks** |
| Monetization | Free | Free |
| Size | 44 MB | 35 MB |
| Requires iOS | **9.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [North Park Innovations Group, Inc.](https://appshunter.io/developer/595381427) | [Appion Inc.](https://appshunter.io/developer/978979622) |

## What reviewers say

### iManifoldCR

[App page](https://appshunter.io/ios/app/imanifoldcr/id1394856536)

This app helps HVAC/R professionals calculate system performance and troubleshoot issues. It supports over 40 refrigerants and offers equipment profiling for various common systems.

**Highlights:** HVAC/R system performance calculation, Troubleshoot system problems, User inputs and live system data, Over 40 selectable refrigerants, Equipment profiling options

**Features:** macOS Compatibility

**In-app purchases:** none


### Appion Central

[App page](https://appshunter.io/ios/app/appion-central/id1455230837)

Manage your HVAC tools and connect to the web portal. This app provides a mobile interface for your Appion products.

**Highlights:** Manage Appion products, Interface with Appion Portal, Mobile tool management

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is iManifoldCR free?

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

### Is Appion Central free?

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

### Which has better reviews, iManifoldCR or Appion Central?

iManifoldCR is rated higher. iManifoldCR averages 3.8 out of 5 from 11 ratings, while Appion Central averages 2.8 from 14 ratings.

### Do iManifoldCR or Appion Central have ads?

Neither iManifoldCR nor Appion Central shows ads.

### Which is updated more often, iManifoldCR or Appion Central?

iManifoldCR ships an update every 2 months, and Appion Central every 5 weeks. Most recently, iManifoldCR was updated on October 24, 2026 and Appion Central on October 19, 2026.

---

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