# A/C Pro vs SUMMIT LITHIUM

The clearest difference is update cadence: SUMMIT LITHIUM at every 2 months against A/C Pro's every 4 months. A/C Pro's advantage is chart position (#203 vs unranked). On price, ads, in-app purchases and device support there is nothing between them.

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

A/C Pro ships an update every 4 months, SUMMIT LITHIUM every 2 months. The most recent releases landed on September 19, 2026 and May 16, 2026 respectively.

## The numbers

| Metric | A/C Pro | SUMMIT LITHIUM |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.1 (293 ratings)](https://appshunter.io/ios/app/ac-pro/id1496953441/reviews)** | — |
| Number of ratings | **293** | — |
| Positive reviews | 27.1% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 months** |
| Monetization | Free | — |
| Best chart rank | **#203** | — |
| Size | 192 MB | 42 MB |
| Requires iOS | 13.0 | **12.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Energizer](https://appshunter.io/developer/1346066670) | [江西达伙网络科技有限公司](https://appshunter.io/developer/1234844673) |

## What reviewers say

### A/C Pro

[App page](https://appshunter.io/ios/app/ac-pro/id1496953441)

**Currently charting:** #203 Top Free · Reference (US App Store)

This app guides you through recharging your vehicle's air conditioning system with step-by-step instructions tailored to your specific car. It offers video tutorials, helps locate the low side pressure port, and provides essential vehicle specifications for a successful DIY recharge.

**Highlights:** Step-by-step vehicle-specific instructions, Bluetooth connectivity with Smartcharge™ gauge, Instructional videos, Low side port finder, A/C spec database, Troubleshooting guide

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

**In-app purchases:** none

**What reviewers like**

- 👍 Easy to use
- 🚀 Helpful step-by-step instructions
- 🚀 Effective at recharging AC
- 👍 Clear and informative videos

**What reviewers complain about**

- 🐛 App crashes or doesn't work
- 🐛 UPC code not recognized
- 🐛 Incorrect vehicle information
- 🔒 Requires too many permissions
- 🔒 Forced to create account

**Reported bugs**

- App crashes when trying to enter UPC code
- Vehicle information not loading properly
- Bluetooth connection issues

**Requested features**

- Option to bypass app and use analog gauge
- More comprehensive vehicle database
- Closed captions for instructional videos


### SUMMIT LITHIUM

[App page](https://appshunter.io/ios/app/summit-lithium/id6752213651)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is A/C Pro free?

A/C Pro is free to download, with no in-app purchases.

### Is SUMMIT LITHIUM free?

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

### Do A/C Pro or SUMMIT LITHIUM have ads?

Neither A/C Pro nor SUMMIT LITHIUM shows ads.

### Which is updated more often, A/C Pro or SUMMIT LITHIUM?

A/C Pro ships an update every 4 months, and SUMMIT LITHIUM every 2 months. Most recently, A/C Pro was updated on September 19, 2026 and SUMMIT LITHIUM on May 16, 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.*