Flash Page Speed Optimizer vs LinkGuard
Two Shopify apps, side by side: detected stores, momentum, reviews, plans, listed features and who runs each. Store counts as of Oct 13, 2026.
The short answer
- Paid plans start at $49/month for Flash Page Speed Optimizer and $7/month for LinkGuard.
Head to head
Flash Pro
- · Auto Lazy-load images & iframes
- · Before/after Google PageSpeed scores
- · Optimize Page Speed & Core Web Vitals
- · Page targeting with on/off control
- · Unlimited Monthly Sessions
Basic
- · Open all external links in a new tab automatically.
Secure
- · Automatically secures external links, and opens them in a new tab.
Extra Secure
- · Automatically adds https too all external links, secures links, and opens them in a new tab.
Coverage counts what each App Store listing names. Every feature, checked off app by app, is in Shoplist.
See every featureFlash Page Speed Optimizer speeds up your shop's loading process without any code or theme edits. How? By improving your Google PageSpeed Score, real users' CrUX metrics, and Core Web Vitals scores like TBT, LCP, and CLS through deferred scripts from third-party vendors, lazy image and iframe loading, and reduced render-blocking resources.
LinkGuard helps your Google Lighthouse scores for best practices by automatically securing your external links with the proper attributes, adds https protocol to all links, and opens them up in a new tab. No code required.
- Optimize Page Speed and Core Web Vitals (LCP, CLS, TBT) on mobile & desktop
- Check before-and-after Google PageSpeed scores inside the app
- One-click setup with no code or manual theme edits
- Choose which pages are optimized, with on/off control anytime
- Automatically helps your Google Lighthouse score
- Automatically secure and open external links in a new browser tab
- One click setup, no code required
All the numbers
Every figure, side by side
A green dot marks the app ahead on a measured figure. Estimates, gaps and apps that leave no storefront trace never take the lead.
Adoption
| Measure |  Flash Page Speed Optimizer |  LinkGuard |
|---|---|---|
| Detected stores | Not published | Not published |
| Net store change, 28 days | 0 | 0 |
| Stores added, 28 days | Not enough data | Not enough data |
| Big-brand share | Not enough data | Not enough data |
| Top store categories | Not published | Not published |
| Top store countries | Not published | Not published |
Reviews
| Measure | Flash Page Speed Optimizer | LinkGuard |
|---|---|---|
| App Store rating | 5.0 ★ | Not published |
| App Store reviews | 1 | Not published |
| New reviews, 28 days | Not enough data | Not enough data |
| Reviewers a year or more in | Not enough data | Not enough data |
Pricing
| Measure | Flash Page Speed Optimizer | LinkGuard |
|---|---|---|
| Free plan | Not listed | Not listed |
| Lowest paid monthly plan | $49/month | $7/month(ahead) |
| Longest free trial | 5 days | 7 days |
| Plans listed | 1 | 3 |
Listing
| Measure | Flash Page Speed Optimizer | LinkGuard |
|---|---|---|
| Shopify category rank | #83(ahead) | #137 |
| Shopify App Charts | Not on this week’s charts | Not on this week’s charts |
| Built for Shopify | No | No |
| Launched | Jul 2, 2026 | Jul 10, 2024 |
| Languages | 1 | 1 |
| Developer | Yash Sardhara | Sizzle |
FAQ
Flash Page Speed Optimizer and LinkGuard: common questions
- Is Flash Page Speed Optimizer or LinkGuard cheaper?
- Paid plans start at $49/month for Flash Page Speed Optimizer and $7/month for LinkGuard. Shoplist compares base prices only between monthly plans in the same currency; usage charges and annual plans vary, so check each plan’s limits.
- Where does this comparison’s data come from?
- Shoplist crawls Shopify storefronts to detect which apps each store runs, and reads each app’s Shopify App Store listing for reviews, pricing, features and integrations. Store counts are as of Oct 13, 2026; estimated figures are labeled.
How Shoplist compares apps
Store counts come from Shoplist’s crawl of Shopify storefronts, which detects the apps each store runs; they are as of Oct 13, 2026. Reviews, ratings, plans, features and integrations come from each app’s Shopify App Store listing. 28-day figures are labeled when estimated, and a figure that is missing or estimated never decides who leads. Read the methodology.