# Rheem Calcu Save vs zupper

The clearest difference is iOS requirement: Rheem Calcu Save at 12.0 against zupper's 16.0. On price, update cadence, 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.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 29, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | Rheem Calcu Save | zupper |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (44 ratings)](https://appshunter.io/ios/app/rheem-calcu-save/id1110121420/reviews)** | — |
| Number of ratings | **44** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Free | — |
| Size | 20 MB | 32 MB |
| Requires iOS | **12.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Copeland LP](https://appshunter.io/developer/464252882) | [Taizhou Juli Tools Co., Ltd.](https://appshunter.io/developer/1440783443) |

## What reviewers say

### Rheem Calcu Save

[App page](https://appshunter.io/ios/app/rheem-calcu-save/id1110121420)

This app helps HVAC contractors quickly calculate and present potential cost savings to homeowners when comparing residential HVAC system replacements. It generates professional reports showing annual savings for high-efficiency systems, aiding customer decision-making.

**Highlights:** Calculate HVAC system replacement cost savings, Compare multiple replacement options, Generate professional graphical reports, Email reports to customers, Uses Emerson Climate Technologies OPI database, Compares against industry minimum standards

**Features:** macOS Compatibility

**In-app purchases:** none


### zupper

[App page](https://appshunter.io/ios/app/zupper/id1440783444)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Rheem Calcu Save free?

Rheem Calcu Save is free to download, with no in-app purchases.

### Is zupper free?

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

### Do Rheem Calcu Save or zupper have ads?

Neither Rheem Calcu Save nor zupper shows ads.

### Which is updated more often, Rheem Calcu Save or zupper?

Rheem Calcu Save ships an update every 2 months, and zupper every 2 months. Most recently, Rheem Calcu Save was updated on October 29, 2026 and zupper on October 26, 2026.

---

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