# iManifold vs Appion Central

The clearest difference is in-app purchases: Appion Central at none against iManifold's 10. iManifold's advantage is rating (3.1 vs 2.8) and review sentiment (50% vs 29%). On price, ratings volume, update cadence and ads there is nothing between them.

Both are free to download. iManifold sells 10 one-off in-app purchases. Appion Central asks for nothing beyond the download.

iManifold holds the better App Store score, 3.1 against 2.8. Both are backed by a comparable volume of ratings — 38 and 14 respectively. Written reviews point the same way: 50% of iManifold's written reviews are positive against 29% of Appion Central's.

iManifold ships an update every 3 weeks, Appion Central every 5 weeks. The most recent releases landed on November 1, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | iManifold | Appion Central |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.1 (38 ratings)](https://appshunter.io/ios/app/imanifold/id784602842/reviews)** | [2.8 (14 ratings)](https://appshunter.io/ios/app/appion-central/id1455230837/reviews) |
| Number of ratings | **38** | 14 |
| Positive reviews | **50.0% of reviews** | 28.6% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 5 weeks |
| Monetization | Free with in-app purchases | **Free** |
| Size | 29 MB | 35 MB |
| Requires iOS | **12.0** | 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

### iManifold

[App page](https://appshunter.io/ios/app/imanifold/id784602842)

This app calculates HVAC/R system performance and aids in troubleshooting. It offers a wide selection of refrigerants and equipment profiling for various common systems.

**Highlights:** Calculates HVAC/R system performance, Troubleshoots system problems, User input and live system data, Over 40 selectable refrigerants, Equipment profiling options, Customizable for common HVAC/R systems

**Features:** macOS Compatibility

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Charge & Airflow Report | $0.99 | one-time |
| Mechanical Inspection | $0.99 | one-time |
| Equipment Replacement Report | $0.99 | one-time |
| CSV Export | $0.99 | one-time |
| Annualized Savings Report | $0.99 | one-time |
| Gas Furnace Report | $0.99 | one-time |
| iManifold Report Pro - 1 Circuit | $1.99 | one-time |
| iManifold Report Pro - 2 Circuit | $2.99 | one-time |
| iManifold Report Pro - 3 Circuit | $3.99 | one-time |
| iManifold Report Pro - 4 Circuit | $4.99 | one-time |


### 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 iManifold free?

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

### Is Appion Central free?

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

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

iManifold is rated higher. iManifold averages 3.1 out of 5 from 38 ratings, while Appion Central averages 2.8 from 14 ratings.

### Do iManifold or Appion Central have ads?

Neither iManifold nor Appion Central shows ads.

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

iManifold ships an update every 3 weeks, and Appion Central every 5 weeks. Most recently, iManifold was updated on November 1, 2026 and Appion Central on November 2, 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.*