# BidChex vs CoolCalc

The clearest difference is in-app purchases: BidChex at none against CoolCalc's 3. BidChex also leads on update cadence (every 4 days vs monthly) and device support (3 vs 1). On price, ads and iOS requirement there is nothing between them.

Both are free to download. CoolCalc sells 3 in-app purchases, starting at $9.99 per month. BidChex asks for nothing beyond the download.

BidChex ships an update every 4 days, CoolCalc monthly. The most recent releases landed on October 17, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | BidChex | CoolCalc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/coolcalc-hvac-tools/id6773545951/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 4 days** | Monthly |
| Monetization | — | Free with in-app purchases |
| Size | 66 MB | 29 MB |
| Requires iOS | **15.1** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Eat Local](https://appshunter.io/developer/659607344) | [杰 陈](https://appshunter.io/developer/1746018277) |

## What reviewers say

### BidChex

[App page](https://appshunter.io/ios/app/bidchex/id6761010044)

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

**In-app purchases:** none


### CoolCalc

[App page](https://appshunter.io/ios/app/coolcalc-hvac-tools/id6773545951)

This offline toolkit for service technicians provides essential HVAC calculations, job documentation, and professional PDF reporting. It supports A2L refrigerants and prioritizes user privacy with no account or cloud storage required.

**Highlights:** Offline HVAC calculations, PT Chart and Charge Check, Duct Sizing and Airflow Calcs, Capacitor and Refrigerant Log, Professional PDF report generation, A2L refrigerant support, Privacy-focused, no account needed

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| CoolCalc Pro Monthly | $9.99 | per month |
| CoolCalc Pro Yearly | $59.99 | per year |
| CoolCalc Pro Lifetime | $99.99 | one-time |


## Frequently asked questions

### Is BidChex free?

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

### Is CoolCalc free?

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

### Do BidChex or CoolCalc have ads?

Neither BidChex nor CoolCalc shows ads.

### Which is updated more often, BidChex or CoolCalc?

BidChex ships an update every 4 days, and CoolCalc monthly. Most recently, BidChex was updated on October 17, 2026 and CoolCalc on October 15, 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.*