# SidelineSwap vs Undrdog

The clearest difference is update cadence: SidelineSwap at every 5 days against Undrdog's every 2 months. SidelineSwap also leads on ratings volume (59K vs 16). Undrdog's advantage is review sentiment (100% vs 80%) and monetization model (free vs ad-supported). On price, rating, ads and in-app purchases there is nothing between them.

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

On the App Store both sit at effectively the same score — 4.9 for SidelineSwap against 4.9 for Undrdog. That said, the two scores are not equally well evidenced: SidelineSwap has 59K ratings behind it against 16, so its average is the more settled of the two. Written reviews are what separate them: 80% of SidelineSwap's written reviews are positive against 100% of Undrdog's.

SidelineSwap ships an update every 5 days, Undrdog every 2 months. The most recent releases landed on October 17, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | SidelineSwap | Undrdog |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.9 (59K ratings)](https://appshunter.io/ios/app/sidelineswap/id1215421737/reviews) | [4.9 (16 ratings)](https://appshunter.io/ios/app/undrdog/id6754082581/reviews) |
| Number of ratings | **59K** | 16 |
| Positive reviews | 80.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 days** | Every 2 months |
| Monetization | Ad-supported | **Free** |
| Size | 79 MB | 75 MB |
| Requires iOS | 17.4 | **15.1** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [SidelineSwap, Inc](https://appshunter.io/developer/1215421736) | [joel accuardi](https://appshunter.io/developer/1855409412) |

## What reviewers say

### SidelineSwap

[App page](https://appshunter.io/ios/app/sidelineswap/id1215421737)

This app connects athletes to buy and sell sports equipment. Find new and used gear at significant discounts or easily list your own items to earn cash. Join a global community of athletes trading their sports essentials.

**Highlights:** Shop new and used sports equipment, Save up to 70% on gear, Sell equipment in minutes, Prepaid shipping labels provided, Global marketplace for athletes

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

**In-app purchases:** none

**What reviewers like**

- 🚀 Easy to list and sell items
- 👍 Convenient shipping and payment process
- 🚀 Fast sales
- 👍 Lots of items to choose from
- 👍 Great way to buy/sell used sports gear

**What reviewers complain about**

- 💰 High fees and commissions for sellers
- 🔒 Lack of buyer/seller reviews
- 🐛 Buggy app with technical issues
- 🔒 Poor customer support and dispute resolution
- 🔒 Counterfeit items allowed on the platform

**Reported bugs**

- App login issues
- Listing items gets stuck in draft status
- Notification badges not clearing properly

**Requested features**

- Add support for Canadian currency
- Allow sellers to rate buyers
- Improve in-app communication between buyers and sellers
- Provide more transparency on fees and policies


### 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 SidelineSwap free?

SidelineSwap 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, SidelineSwap or Undrdog?

SidelineSwap and Undrdog are both rated 4.9 out of 5 on the App Store, from 59K and 16 ratings respectively.

### Do SidelineSwap or Undrdog have ads?

Neither SidelineSwap nor Undrdog shows ads.

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

SidelineSwap ships an update every 5 days, and Undrdog every 2 months. Most recently, SidelineSwap was updated on October 17, 2026 and Undrdog on October 7, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*