Calendar Systems vs ACV MAX
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Calendar Systems
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.
- Customer photo submission
- Mobile upload capability
- Streamlined workflow
- For auto dealership sales staff
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The new Mobile App from Calendar Systems allows sales staff at auto dealerships nationwide to easily submit their customer photos to Calendar Systems straight from their phones.
ACV MAX
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.
- 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
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ACV MAX is the complete next generation appraisal and inventory management application. A lightning fast scanner provides access to vehicle information quickly, whether you’re appraising a vehicle or viewing a piece of inventory. When appraising you can view your guidebooks (KBB, J.D. Power, BlackBook, Galves), vehicle history reports (CarFax and Autocheck), market listing data, and take photos. For your used car inventory you can price, photograph and merchandise on the go! ACV Viper is our next-gen inspection system that lives within a dealer's service drive. Viper will take photos of the full vehicle, detect damage, read tire tread depths & more. Viper inspections are available through the ACV MAX app.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Calendar Systems | ACV MAX |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (6 ratings) | 4.7 (2.1K ratings) — better |
| Positive reviews | 0.0% of reviews | 11.1% of reviews — better |
| Number of ratings | 6 | 2.1K — better |
| Update frequency | Weekly — better | Monthly |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 12.2 — better | 15 |
| Further details — not scored | ||
| Size | 66 MB | 437 MB |
| Age rating | 4+ | 4+ |
| Developer | Chris Butterfield | ACV Auctions Inc |
Customer experience
Calendar Systems
ACV MAX
In-app purchases
Calendar Systems
No in-app purchases
ACV MAX
No in-app purchases
Questions
Is Calendar Systems free?
Is ACV MAX free?
Which has better reviews, Calendar Systems or ACV MAX?
Do Calendar Systems or ACV MAX have ads?
Which is updated more often, Calendar Systems or ACV MAX?
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