Side-by-side comparison · 24 data points
Unlimited appointments, booking calendars, and notifications. Powerful appointment booking plugin and booking system. Start scheduling for free today!
| Really Simple Security – Simple and Performant Security (formerly Really Simple SSL) | Appointment Booking Calendar | |
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Easily improve site security with WordPress Hardening, Two-Factor Authentication (2FA), Login Protection, Vulnerability Detection and SSL certificate.
| Metric | Really Simple Security – Simple and Performant Security (formerly Really Simple SSL) | Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin |
|---|---|---|
| Rating | 4.9 ★ | ★ 5.0 ★ |
| Total reviews | ★ 8.8k | 154 |
| Active installs | 3,000,000+ | 60,000+ |
| Free plan | — | — |
| Built for Shopify | — | — |
Really Simple Security – Simple and Performant Security (formerly Really Simple SSL) and Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin are evenly matched on rating (4.9★ vs 5.0★) — the differentiator comes down to pricing fit, feature breadth, and which app's interaction pattern suits your team's workflow. Really Simple Security – Simple and Performant Security (formerly Really Simple SSL) has the larger user base (8,803 reviews vs 154), which usually maps to broader integration coverage, faster bug-fix cadence, and a deeper bench of community workflow patterns. Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin's smaller cohort can be an advantage for niche workflows where the bigger app has accumulated bloat. Recommended evaluation path: install both apps' free tiers (where available) and run them in parallel on a small cohort of orders for 7-14 days before committing. The data tables below show the per-feature breakdown — for most merchants the deciding factor will be a single integration or workflow detail that's hard to compare from listing pages alone. This verdict is generated from the live marketplace data on this page — rating, review count, pricing tier, and category position all refresh from the canonical WordPress Plugin Directory listing every 24 hours. AppRanks does not accept payment to influence comparison outcomes; the methodology is documented on the About page and applies identically to every pair on the site.
Read each app's audit: Really Simple Security – Simple and Performant Security (formerly Really Simple SSL) audit • Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin audit
| Keyword | Really Simple Security – Simple and Performant Security (formerly Really Simple SSL) | Appointment Booking Calendar |
|---|---|---|
| form | #122 | #444 |
Really Simple Security – Simple and Performant Security (formerly Really Simple SSL) (4.9★, 8,803 reviews) and Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin (5.0★, 154 reviews) are essentially tied on rating. Look at review velocity and individual reviewer quotes — both visible on each app's detail page — to differentiate.
It depends on what you're optimizing for. Really Simple Security – Simple and Performant Security (formerly Really Simple SSL) fits better if you prioritize broader integrations; Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin is the call if you need the higher-rated option. Read both apps' detail pages on AppRanks for the full feature breakdown, install counts, and recent listing changes.
Both apps are one-click installs from the WordPress Plugin Directory marketplace. Really Simple Security – Simple and Performant Security (formerly Really Simple SSL) has more onboarding documentation maturity (8,803 reviews vs 154), which usually translates to better-tested setup wizards and quicker time-to-value. AppRanks doesn't measure setup time directly — read the recent reviews on each app's detail page for merchant-reported install experience.
Really Simple Security – Simple and Performant Security (formerly Really Simple SSL) typically suits established stores with steady traffic based on its review-base composition (8,803 reviews). Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin aligns more with early-stage and growth-mode stores (154 reviews). Larger review bases generally mean the app has been load-tested at scale — relevant if you're processing high order volume or handling enterprise compliance requirements.
Migration support varies by app and category. Really Simple Security – Simple and Performant Security (formerly Really Simple SSL) and Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin both publish their export options on their marketplace listing pages (or in their support docs); some apps offer one-click import from competitors, others require CSV. The fastest check: search "import from Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin" in each app's help center. AppRanks does not track migration tooling directly — this is a category-specific capability worth verifying before commitment.