You built your Shopify store on a desktop computer. It looks great. Then you check it on your phone — and the menu is unusable, images are cut off, and the add-to-cart button is barely visible. This is one of the most common problems we see at OneOnic, and it has a direct impact on sales because the majority of your shoppers are on mobile.
The Most Common Shopify Mobile Display Problems
- Hamburger menu not opening: Often caused by a JavaScript conflict with an installed app. The menu renders but the toggle script fails silently.
- Images overflowing the screen: Large banner images with fixed pixel widths spill beyond the viewport on small screens. The fix requires the theme to use percentage-based or responsive image widths.
- Text too small to read: Themes that don’t scale font sizes for mobile leave your product descriptions as tiny, unreadable text. Base font size on mobile should be at least 16px.
- Buttons too small to tap: Apple’s HIG guidelines recommend a minimum tap target of 44×44 points. Many older themes use 30px buttons that are frustrating to tap accurately on a phone screen.
- Checkout button below the fold: On long product pages, the add-to-cart button scrolls out of view. Without a sticky cart bar, mobile buyers have to scroll back up to purchase — and many don’t bother.
- Layout breaks in portrait vs landscape: Some themes handle portrait mode fine but break when a user rotates their phone. Layouts that rely on fixed pixel widths cause this.
How to Diagnose Mobile Problems on Your Shopify Store
The fastest way is to use Chrome DevTools on your desktop. Open your store URL in Chrome, right-click and select “Inspect”, then click the device toggle icon at the top of the panel to simulate a mobile screen. Try iPhone 12 (390px wide) and an Android device (360px wide) as your test sizes.
Also physically test on real devices — Chrome DevTools doesn’t catch JavaScript failures the way a real phone does. Test your navigation, product pages, and the checkout flow on at least one iOS and one Android device before considering the problem fixed.
Fixes You Can Apply Without Changing Your Theme
- Go to your theme’s CSS customisation area and check if any rules use fixed pixel widths (e.g.,
width: 1200px) — replace withmax-width: 100% - Disable any apps that inject custom JavaScript and re-test your mobile navigation one by one to isolate conflicts
- In your theme settings, look for a “mobile menu” section and ensure it’s enabled and pointing to the correct navigation menu
- Check your banner images — if they’re set to a fixed desktop size, switch them to responsive mode in your theme editor
The Fix: Try Granivio Free on Shopify
If mobile display problems are deep-rooted in your current theme’s code, the most efficient solution is switching to a theme that was built mobile-first. Granivio is engineered to work flawlessly across all screen sizes. The mobile navigation, product image scaling, button sizes, and sticky cart bar are all properly implemented out of the box — no custom CSS required.
You can try Granivio free and test your entire product catalogue on mobile before committing. For stores with complex layouts or many customisations, OneOnic can manage the migration and verify mobile functionality across devices.
Frequently Asked Questions
Why does my Shopify store look different on iPhone vs Android?
iOS Safari and Android Chrome render certain CSS properties differently. Font rendering, flexbox behaviour, and scroll behaviour can vary between the two. The safest fix is to use a well-tested theme that has been QA’d across both platforms — Granivio is tested on both iOS Safari and Android Chrome as part of Shopify’s official theme review process.
Can I fix mobile display problems without changing my theme?
Some issues — like specific image overflow problems or button sizes — can be fixed with targeted CSS edits in your theme’s custom CSS section. More systemic problems (broken navigation, poor layout at all breakpoints, missing responsive image handling) are usually baked into the theme’s structure and can’t be fixed without rewriting significant parts of the theme code. Switching themes is typically faster and safer.
How important is mobile optimisation for Shopify stores in India?
Extremely important. India has one of the world’s highest mobile commerce rates — over 75% of online shopping traffic comes from smartphones, and a significant proportion of those are mid-range Android devices with smaller screens and slower connections. If your Shopify theme isn’t genuinely mobile-optimised, you’re effectively excluding the majority of Indian online shoppers.
Need Expert Help Building Your Shopify Store?
OneOnic has built 100+ Shopify stores across India for furniture, fashion, home decor, tiles, candles, and more. We handle design, development, SEO, and growth.
