# AMSOIL vs Undrdog

The clearest difference is review sentiment: Undrdog at 100% against AMSOIL's 54%. Undrdog also leads on rating (4.9 vs 4.2). AMSOIL's advantage is update cadence (fortnightly vs every 2 months) and ratings volume (263 vs 16). 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.

Undrdog holds the better App Store score, 4.9 against 4.2. That said, the two scores are not equally well evidenced: AMSOIL has 263 ratings behind it against 16, so its average is the more settled of the two. Written reviews point the same way: 54% of AMSOIL's written reviews are positive against 100% of Undrdog's.

AMSOIL ships an update fortnightly, Undrdog every 2 months. The most recent releases landed on September 28, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | AMSOIL | Undrdog |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.2 (263 ratings)](https://appshunter.io/ios/app/amsoil/id6748611692/reviews) | **[4.9 (16 ratings)](https://appshunter.io/ios/app/undrdog/id6754082581/reviews)** |
| Number of ratings | **263** | 16 |
| Positive reviews | 53.8% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 2 months |
| Monetization | Free | Free |
| Size | 33 MB | 75 MB |
| Requires iOS | 15.1 | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [AMSOIL](https://appshunter.io/developer/1826557400) | [joel accuardi](https://appshunter.io/developer/1855409412) |

## What reviewers say

### AMSOIL

[App page](https://appshunter.io/ios/app/amsoil/id6748611692)

Manage your vehicle maintenance and order premium synthetic oils. Track oil changes, set reminders, and get personalized product recommendations for all your vehicles. Shop and reorder with ease for your cars, motorcycles, ATVs, and more.

**Highlights:** Vehicle maintenance tracking, Personalized product recommendations, License plate & VIN scanner, Easy reordering of oils and filters, Maintenance reminders, Biometric login

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 👍 Easy to use
- 🚀 Excellent mileage
- 💡 Useful service record feature

**What reviewers complain about**

- 🐛 Login issues
- 🐛 Slow performance
- 🐛 Inability to print orders

**Reported bugs**

- Unable to log in through the app
- MyGarage information takes forever to load
- App crashes

**Requested features**

- Remove 'join now' pop-up for existing users
- Register app with META for better advertising


### Undrdog

[App page](https://appshunter.io/ios/app/undrdog/id6754082581)

Discover premium auto and marine detailing supplies with an intuitive shopping experience. Easily browse, purchase, and manage loyalty points. Access Carfax uploads and find local detailers.

**Highlights:** Curated selection of detailing supplies, Intuitive browsing and purchasing, Carfax upload access, Find a Detailer map, Loyalty points tracking, Secure transactions

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


## Frequently asked questions

### Is AMSOIL free?

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

### Is Undrdog free?

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

### Which has better reviews, AMSOIL or Undrdog?

Undrdog is rated higher. AMSOIL averages 4.2 out of 5 from 263 ratings, while Undrdog averages 4.9 from 16 ratings.

### Do AMSOIL or Undrdog have ads?

Neither AMSOIL nor Undrdog shows ads.

### Which is updated more often, AMSOIL or Undrdog?

AMSOIL ships an update fortnightly, and Undrdog every 2 months. Most recently, AMSOIL was updated on September 28, 2026 and Undrdog on September 19, 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.*