# Calendar Systems vs ACV MAX

The clearest difference is ratings volume: ACV MAX at 2.1K against Calendar Systems's 6. ACV MAX also leads on rating (4.7 vs 4.5) and review sentiment (11% vs 0%). Calendar Systems's advantage is update cadence (weekly vs monthly) and iOS requirement (12.2 vs 15). On price, ads, in-app purchases and monetization model there is nothing between them.

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

ACV MAX holds the better App Store score, 4.7 against 4.5. That said, the two scores are not equally well evidenced: ACV MAX has 2.1K ratings behind it against 6, so its average is the more settled of the two. Written reviews point the same way: 0% of Calendar Systems's written reviews are positive against 11% of ACV MAX's.

Calendar Systems ships an update weekly, ACV MAX monthly. The most recent releases landed on October 24, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Calendar Systems | ACV MAX |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (6 ratings)](https://appshunter.io/ios/app/calendar-systems/id1082931045/reviews) | **[4.7 (2.1K ratings)](https://appshunter.io/ios/app/acv-max/id1525909988/reviews)** |
| Number of ratings | 6 | **2.1K** |
| Positive reviews | 0.0% of reviews | **11.1% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Weekly** | Monthly |
| Monetization | Free | Free |
| Size | 66 MB | 437 MB |
| Requires iOS | **12.2** | 15 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Chris Butterfield](https://appshunter.io/developer/1082931044) | [ACV Auctions Inc](https://appshunter.io/developer/969808942) |

## What reviewers say

### Calendar Systems

[App page](https://appshunter.io/ios/app/calendar-systems/id1082931045)

This mobile application enables automotive sales professionals across the country to quickly upload customer photos directly from their smartphones. It streamlines the process of submitting images to the Calendar Systems platform.

**Highlights:** Customer photo submission, Mobile upload capability, Streamlined workflow, For auto dealership sales staff

**Features:** macOS Compatibility

**In-app purchases:** none


### ACV MAX

[App page](https://appshunter.io/ios/app/acv-max/id1525909988)

Manage vehicle appraisals and inventory with a fast scanner for quick access to vehicle data. View guidebooks, history reports, market data, and take photos. Price, photograph, and merchandise used cars on the go.

**Highlights:** Vehicle appraisal management, Inventory management, Lightning fast scanner, View guidebooks (KBB, J.D. Power, etc.), Access vehicle history reports (CarFax, Autocheck), Market listing data, Photo taking capability

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

**In-app purchases:** none


## Frequently asked questions

### Is Calendar Systems free?

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

### Is ACV MAX free?

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

### Which has better reviews, Calendar Systems or ACV MAX?

ACV MAX is rated higher. Calendar Systems averages 4.5 out of 5 from 6 ratings, while ACV MAX averages 4.7 from 2.1K ratings.

### Do Calendar Systems or ACV MAX have ads?

Neither Calendar Systems nor ACV MAX shows ads.

### Which is updated more often, Calendar Systems or ACV MAX?

Calendar Systems ships an update weekly, and ACV MAX monthly. Most recently, Calendar Systems was updated on October 24, 2026 and ACV MAX on October 28, 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.*