Complimus: EU Omnibus Price helps Shopify merchants track product prices and display the lowest prior price when running a discount. It is built for stores that sell to EU customers and need a practical way to manage price-reduction disclosures across a catalog. Instead of maintaining a spreadsheet for every product and variant, the app stores price-history data in Shopify product metafields and can show it on the product page through a theme app block.
Key features
The core job is automatic price tracking and a storefront display for the lowest price in the relevant lookback period. Complimus can include store-wide discount codes in its calculation, flags products that need attention, and supports Shopify Markets, currencies, variants, and translations. The app's block can be placed in the theme editor and styled to fit the product page. For older or heavily customized themes, the developer's documentation notes that a template-code change may still be needed.
There is also a useful operational detail: the price data lives in Shopify metafields. That makes the information available to the storefront and lets the app mark products as compliant, non-compliant, or mixed when variants differ. If you are also working on digital-product disclosures, our EU withdrawal requirement guide covers a separate customer-acknowledgement issue that price tracking does not solve.
Pricing and free trial
Complimus has a free plan for stores with up to 100 monthly orders and 100 products. It includes the core lowest-prior-price display, tools for finding pricing issues, store-wide discount-code support, and live-chat setup help. The paid Omnibus Autopilot plan starts at $14.99 per month on Shopify Basic. It scales with the Shopify plan: $29.99 on Grow, $59.99 on Advanced, and $99.99 on Plus. Autopilot includes unlimited products, variants, and markets, plus a 14-day free trial.
The free plan is a genuine way to test the workflow on a small store. For a larger catalog or multiple markets, the paid price needs to be considered as a compliance operating cost, not just another visual widget subscription.
Rating and reviews
At the time of review, the Shopify App Store shows a 4.9 rating from 62 reviews and marks Complimus as Built for Shopify. The recurring theme in recent reviews is fast, capable support, especially when a store has a custom theme or needs help with configuration. Merchants also mention the inclusion of Shopify discount codes and the ability to translate or style the message. The review count is still modest, so I would treat the score as encouraging rather than conclusive.
Pitfalls
The most important limitation is timing. The app says it starts collecting price history after installation, so installing it just before a campaign does not give you a full prior-price record. Price data is updated daily, and the app lets you run calculations when checking a campaign, but merchants should test this before publishing a sale. You should also test variants, market-specific prices, automatic discounts, discount codes, and the final widget placement in your live theme.
Complimus can automate calculations and display, but it cannot decide whether a particular promotion or the configured period is correct for every country and situation. It is a useful operational tool, not legal advice. Finally, the Autopilot price increases sharply on higher Shopify plans, which may be hard to justify for a store that only runs occasional promotions.
Conclusion
I would choose Complimus if I sell into EU markets, run regular promotions, and want the lowest-prior-price process to live inside Shopify rather than in a manual spreadsheet. It is especially credible for Shopify Markets stores because it covers markets, variants, currencies, and store-wide codes. Install it before the sales calendar starts, use the free plan to validate the setup where it fits, and move to Autopilot only when the higher limits and automation justify its plan-based price.
