# The hidden costs of Shopify apps

> On Shopify, the platform subscription itself is almost never the largest recurring cost once several apps are installed. Between monthly fees that stack up, charges based on a percentage of revenue, and code left behind by a poorly uninstalled app, the real bill is rarely the one expected at the start.

- Source canonique : [https://allaux.fr/en/shopify/problemes/couts-caches-applications](https://allaux.fr/en/shopify/problemes/couts-caches-applications)
- Langue : EN
- Dernière mise à jour : 2026-09-30

## Direct answer

> Open Settings then Billing in the Shopify admin and go through the app subscriptions line by line, separating the monthly plan from revenue-based fees, which are not listed in the same place. Then check Online Store, Themes, Edit code: an uninstalled app often leaves its tags behind in theme.liquid, billed nowhere but still loaded on every page.

## How I run an audit

1. **List every active app** — I start from the Shopify admin to build a complete list of installed apps, including ones added long ago and forgotten since.
2. **Check what each one actually charges** — Some bill a fixed monthly fee, others a percentage of the revenue they generate: I look at how each app bills, not just its headline price at install time.
3. **Spot free trials that have expired** — A free trial that automatically converts to a paid tier after a set period is a common surprise; I check installation dates against each app’s terms.
4. **Check payment gateway fees** — If a gateway other than Shopify Payments is used, I check whether transaction fees are added on top of the gateway’s own processing fees — this varies with the setup.
5. **Audit traces left by past uninstalls** — I look through the theme’s code and metafields for what an uninstalled app may have left behind, which sometimes keeps slowing the site down.

## What I hear regularly

- My monthly app bill doubled and I didn’t install anything new
- I’ve lost track of what half the apps I’ve enabled are even for
- A free trial turned into a paid subscription without me noticing
- My theme slowed down after I uninstalled an app
- I’m paying for a payment gateway on top of Shopify without knowing if it adds fees

## Where the real bill comes from

Most Shopify apps bill a monthly subscription per store. Once there’s one app per need — reviews, upsells, email, stock sync, page building — those subscriptions add up fast, and often outstrip the Shopify subscription itself. Some apps use a different model: a percentage of the revenue they generate, which climbs quietly as sales grow, without any setting having changed.

Another commonly overlooked cost sits at checkout: using a gateway other than Shopify Payments can add Shopify’s own transaction fee on top of the gateway’s processing fee, depending on the plan. Finally, uninstalling an app doesn’t always remove what it added to the theme — a Liquid snippet, some metafields, leftover data — and that debris can keep weighing on load times well after the subscription ends.

## An audit, not a pricing negotiation

> This is about reviewing what’s actually installed and used, and spotting what’s been forgotten or poorly uninstalled. I don’t negotiate Shopify’s own pricing, which is set by the platform: the work is on the app catalogue and its upkeep, not the Shopify subscription.

## Worth reading next

- **Emergency troubleshooting** — If an uninstall left the theme in an unstable state. ([/services/depannage-urgent](/services/depannage-urgent))
- **Pricing** — How I charge for this kind of work. ([/tarifs](/tarifs))
- **Shopify: overview** — The other Shopify topics I work on. ([/shopify](/shopify))

## FAQ

### How do I know if an app is charging me a percentage of my revenue?

It’s stated in the plan details at install time, but rarely surfaced afterwards: I check this for every active app during an audit.

### Is uninstalling an app enough to remove its impact on the site?

Not always. Some leave code in the theme or data in metafields after being uninstalled, which stays there until it’s removed manually.

### Does Shopify Payments always cost less than another gateway?

Not necessarily in absolute terms, but using a third-party gateway often adds a Shopify-specific transaction fee on top of the gateway’s own: worth checking rather than assuming.

### Can you help me reduce my Shopify subscription?

I can audit the apps and their real cost, which is often the biggest lever available. The Shopify platform subscription itself remains set by Shopify.

### How often should this audit be repeated?

There’s no fixed rule, but repeating it after every round of app trials, or once a year, prevents forgotten subscriptions from quietly piling up.