# Compression Calculator vs Auto Lube Specs

The clearest difference is review sentiment: Auto Lube Specs at 52% against Compression Calculator's 0%. Auto Lube Specs also leads on rating (4.1 vs 3.0) and ratings volume (82 vs 3). Compression Calculator's advantage is ads (none vs shown) and update cadence (every 9 days vs every 12 months). On price, 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.

Auto Lube Specs holds the better App Store score, 4.1 against 3.0. That said, the two scores are not equally well evidenced: Auto Lube Specs has 82 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 0% of Compression Calculator's written reviews are positive against 52% of Auto Lube Specs's.

Compression Calculator ships an update every 9 days, Auto Lube Specs every 12 months. The most recent releases landed on September 30, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Compression Calculator | Auto Lube Specs |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (3 ratings)](https://appshunter.io/ios/app/compression-calculator/id1421927149/reviews) | **[4.1 (82 ratings)](https://appshunter.io/ios/app/auto-lube-specs/id1491691114/reviews)** |
| Number of ratings | 3 | **82** |
| Positive reviews | 0.0% of reviews | **52.4% of reviews** |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Every 9 days** | Every 12 months |
| Monetization | **Free** | Ad-supported |
| Size | 10 MB | 14 MB |
| Requires iOS | **11.4** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Peter Linszter](https://appshunter.io/developer/530077583) | [Rafter Circle Dot Development LLC](https://appshunter.io/developer/1491691113) |

## What reviewers say

### Compression Calculator

[App page](https://appshunter.io/ios/app/compression-calculator/id1421927149)

Calculate engine compression, displacement, and piston speed using specific Honda engine parameters. Select engine components to get precise calculations for your automotive needs.

**Highlights:** Engine compression calculation, Displacement calculation, Piston speed calculation, Honda B, D, H/F, K-Series engine support, Component selection for custom calculations

**Features:** macOS Compatibility

**In-app purchases:** none


### Auto Lube Specs

[App page](https://appshunter.io/ios/app/auto-lube-specs/id1491691114)

Access a comprehensive database of lubrication specifications for vehicles from the last 25 years. Find oil capacities, weights, drain plug torques, and fluid types for transmissions and transfer cases. Includes maintenance light reset instructions.

**Highlights:** Lubrication specifications for 25 years, Oil capacity and weight, Drain plug torques, Transmission fluid specifications, Transfer case fluid specifications, Maintenance light reset instructions

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 👍 Handy for technicians
- 👍 Saves time
- 👍 Accurate information
- 👍 Convenient and easy to navigate
- 👍 Free app

**What reviewers complain about**

- 🐛 App won't load without multiple attempts
- 🐛 Inconsistent updates between Android and Apple
- 🐛 Lacks newer vehicle models
- 🐛 Defaults to liters, requires switching to quarts
- 🐛 Some vehicles have incomplete coverage or no information

**Reported bugs**

- App refuses to load until opened and closed multiple times
- App opens but won't load unless closed and reopened
- Defaults to liters, needs manual switch to quarts
- App is not updated enough on Apple devices
- Different oil fills for the same vehicle on Android vs. Apple

**Requested features**

- Update for newer vehicle models (2023, 2024, 2025+)
- Add older car models (prior to 2000)
- Add oil filter information
- VIN scanner option
- Update for newer vehicles on Apple devices


## Frequently asked questions

### Is Compression Calculator free?

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

### Is Auto Lube Specs free?

Auto Lube Specs is free to download, with no in-app purchases.

### Which has better reviews, Compression Calculator or Auto Lube Specs?

Auto Lube Specs is rated higher. Compression Calculator averages 3.0 out of 5 from 3 ratings, while Auto Lube Specs averages 4.1 from 82 ratings.

### Do Compression Calculator or Auto Lube Specs have ads?

Auto Lube Specs shows ads; Compression Calculator does not.

### Which is updated more often, Compression Calculator or Auto Lube Specs?

Compression Calculator ships an update every 9 days, and Auto Lube Specs every 12 months. Most recently, Compression Calculator was updated on September 30, 2026 and Auto Lube Specs 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.*