This article will suggest to customers the highly recommended applications. These apps are not available in the theme package, you need to download them on Shopify App. Besides, it has been tested and used by us before recommending to customers. However, if there are any problems while using the app, please contact the app's support for assistance.
1. Fontify: Google & Custom Fonts
Fontify allows you to change the font for the whole or part of your website in just a minute.

Fontify is the most used font changer app for Shopify stores. You can apply various Google fonts & Custom fonts for your website elements. Simple steps to make it ready:
1. Select Google fonts from the Fontify library (100% GDPR compliant) or upload your custom fonts
2. Assign elements to apply font or just apply for your whole website
3. Advanced settings: Apply fonts for different devices and countries Livechat support is available to help you anytime.
Highlight features:
Change any Google Fonts in a minute, 100% GDPR compliant
Upload any Custom font you want easily and quickly
Allows the font to be applied to the entire site or to a particular element
Compatible with all Shopify themes & apps: The4 themes, EComposer, etc.
Support multiple languages (Separate fonts for each language)
2. FlashSearch‑AI Search & Filter
Most powerful product search & filter app that creates a better shopping experience & boost sales
Install Flash Search Here >>
Help customers find your product easily & instantly with FlashSearch AI filters. Advanced Product Search Autocomplete Spell-check & Typo Autocorrection Instant search suggestions with live product preview: thumbnail, price, label, rating, in-stock status Smart Search across product and content Synonyms & Stopwords Suggestion Dictionary “Did you mean” feature to avoid giving zero results Keyword-based redirects * Customizable look and feel of search bar Provide livechat support. More features:
Advanced Search: Auto Fill and Auto Correct, Instant Search Suggestions, Synonym
Vertical & horizontal filter menu, Quick View, Add to Cart,Optimized for mobile
Convert more with smart search, merchandising and upsell recommendations, produc
Unlimited number of customizable filters; filers by reviews, tags & metafields
Support product grid layouts from popular Shopify themes & third-party themes
3. Lumise ‑ POD Product Designer
Powerful Product Customizer for POD your store. Let your customers design their own items in minutes

Lumise Product Designer is particularly for print-on-demand stores that sell custom products like t-shirt, mug, phone cases, shoes, blanket, banners etc. Your customers can design their items in an easy and fun way, using tons of product options available in Lumise studio. They can also live preview their item before adding to cart. Lumise definitely helps you attract more customers & increase sales because who doesn't like having a personalized item as they wish, for themselves or for gifts.
Highlight features:
Support any kind of products for customization & live preview
20000+ Clipart, Image stock, social media for free
Import/Export design: Continue to edit design while moving to other devices
800+ Google Font ready to use and updated lifetime
Draw, Text Effect, Layer Mask, Crop Image, Filter effect images, QR code