# Carista OBD2 vs Dip Calc

The clearest difference is price: Carista OBD2 at Free against Dip Calc's $0.99. Carista OBD2 also leads on rating (4.6 vs 4.0) and ratings volume (4.3K vs 2). Dip Calc's advantage is in-app purchases (none vs 10) and ads (none vs shown). On device support and iOS requirement there is nothing between them.

Carista OBD2 is free to download; Dip Calc costs $0.99 up front. Carista OBD2 sells 5 in-app purchases, starting at $19.99 per month. Dip Calc asks for nothing beyond the download.

Carista OBD2 holds the better App Store score, 4.6 against 4.0. That said, the two scores are not equally well evidenced: Carista OBD2 has 4.3K ratings behind it against 2, so its average is the more settled of the two. Written reviews complicate that: 34% of Carista OBD2's written reviews are positive against 50% of Dip Calc's, so the app with the better star average is not the one people write more warmly about.

Carista OBD2 ships an update every 3 weeks, Dip Calc every 8 days. The most recent releases landed on November 9, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Carista OBD2 | Dip Calc |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | **[4.6 (4.3K ratings)](https://appshunter.io/ios/app/carista-obd2/id954363569/reviews)** | [4.0 (2 ratings)](https://appshunter.io/ios/app/dip-calc/id1603724601/reviews) |
| Number of ratings | **4.3K** | 2 |
| Positive reviews | 34.1% of reviews | **50.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 3 weeks | **Every 8 days** |
| Monetization | **Free with in-app purchases** | Paid |
| Best chart rank | **#148** | — |
| Size | 141 MB | 1 MB |
| Requires iOS | 16.4 | **15.2** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Prizmos](https://appshunter.io/developer/954363568) | [CHRISTOPHER GEORGE RUSTAGE](https://appshunter.io/developer/1602304843) |

## What reviewers say

### Carista OBD2

[App page](https://appshunter.io/ios/app/carista-obd2/id954363569)

**Currently charting:** #148 Top Grossing · Utilities (US App Store)

Diagnose warning lights, reset fault codes, and monitor live vehicle data. Customize car features and perform DIY service procedures. Supports over 30 car brands and millions of users worldwide.

**Highlights:** Diagnose and reset fault codes, Monitor live vehicle data, Customize hidden car features, Perform DIY service procedures, Supports 30+ car brands, SFD & SFD2 compatibility

**Features:** Vision Pro support

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 Car – Monthly | $19.99 | per month |
| Pro | $19.99 | per month |
| 1 month Pro | $19.99 | per month |
| 3 month Pro | $29.99 | per 3 months |
| Pro | $59.99 | per year |

**What reviewers like**

- 🚀 Easy to use
- 👍 Customization options
- 🚀 Efficient diagnostics
- 💡 Helpful for maintenance
- 👍 Great customer support

**What reviewers complain about**

- 💰 Expensive subscription
- 🔒 Requires account login
- 🐛 Connectivity issues
- 🔒 Locked features behind paywall
- 🐛 Unreliable functionality

**Reported bugs**

- App crashes and freezes
- Subscription issues and billing problems
- Incompatibility with certain OBD2 adapters
- Customization features not working as expected
- Inaccurate fault code detection

**Requested features**

- Support for more vehicle makes and models
- Offline diagnostics and customization
- Ability to save customization settings
- More detailed error code information
- Improved user interface and navigation


### Dip Calc

[App page](https://appshunter.io/ios/app/dip-calc/id1603724601)

Instantly calculate DMX dip switch settings for lighting equipment. Quickly convert DMX addresses to switch positions or build addresses by tapping switches. Includes a built-in torch for dark environments.

**Highlights:** Calculate DMX dip switch settings from address, Tap switches to build/adjust address, On-screen number pad for address entry, Adjustable increment value, Save favorite increment presets, Store setup notes for jobs, Built-in torch control

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Carista OBD2 free?

Carista OBD2 is free to download, with in-app purchases available.

### Is Dip Calc free?

Dip Calc costs $0.99, with no in-app purchases.

### Which has better reviews, Carista OBD2 or Dip Calc?

Carista OBD2 is rated higher. Carista OBD2 averages 4.6 out of 5 from 4.3K ratings, while Dip Calc averages 4.0 from 2 ratings.

### Do Carista OBD2 or Dip Calc have ads?

Carista OBD2 shows ads; Dip Calc does not.

### Which is updated more often, Carista OBD2 or Dip Calc?

Carista OBD2 ships an update every 3 weeks, and Dip Calc every 8 days. Most recently, Carista OBD2 was updated on November 9, 2026 and Dip Calc on November 3, 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.*