Tracking app vs your own Google Tag Manager
A tracking app is installed in twenty minutes. Your own container costs more once and stays your property afterwards. This comparison shows what that means over three years and in the event of a cancellation.
In short
An app is a rental agreement over your measurement. While it runs, it is convenient. When the subscription ends, the measurement ends too, and the configuration usually cannot be taken along. Your own container lives in your account, can be versioned and exported, and keeps working regardless of whether an invoice is paid. For very simple setups an app can still be the more economical choice.
The differences in detail
A
Subscription tracking app
Rented measurement with a recurring fee
B
Your own GTM container
Configuration inside your own account
| Criterion | Subscription tracking app | Your own GTM container |
|---|---|---|
| Setup time | Very short, often a few clicks. | Longer, because a measurement plan, events and QA are part of it. |
| Running cost | A monthly fee, sometimes tiered by orders or traffic. | No licence fee for the container itself. |
| Ownership of the configuration | Sits with the vendor. | Sits in your own account and can be exported. |
| After cancellation | Measurement stops and the configuration is usually lost. | The container keeps running unchanged. |
| Custom events | Only as far as the app allows. | Freely definable. |
| Cross-domain and multi-surface | Frequently not supported. | Achievable through linker, cookie strategy and a shared container. |
| Traceability | Depends on the visibility the interface grants. | Version history, change log and export are all inspectable. |
| Third-party access | Tied to the account at the vendor. | Any agency and any developer can take over. |
| Maintenance | Largely with the vendor. | In your own hands or through an optional maintenance agreement. |
| Risk | Price changes, removed features, discontinuation. | Own responsibility for updates and platform changes. |
An app can be enough when
- a single shop without a second domain is measured
- standard events suffice
- no meaningful ad spend depends on signal quality
- nobody in-house can or wants to look after tags
- the monthly fee stays small relative to revenue
Your own container pays off when
- measurement spans several systems or domains
- conversion actions are created in your own Ads account
- the configuration has to be documented and transferable
- a later move to first-party or server-side should stay possible
- the cost is calculated over three years
- dependence on a single vendor should be avoided
What to watch out for
What this comparison does not decide
The point is not that apps are bad. The point is that the decision should be deliberate and the cost should be viewed across the full term, not just the first month.
FAQ
Can I take the configuration out of an app?
Usually not. A switch is therefore less an export than a rebuild, for which the measurement plan from the audit provides the basis.
How does the switch work without losing data?
Through a controlled cutover: baseline export, the new path in the workspace, parallel operation, a test purchase, comparison, then disabling the old path. A rollback point stays in place.
Does an own container always pay off?
No. For a very small shop with standard requirements an app can stay cheaper. As soon as several systems, domains or meaningful ad spend come into play, the maths usually flips.
Who maintains the container afterwards?
You, any agency of your choice, or FW Delta through an optional maintenance or monitoring agreement. There is no mandatory commitment.
What does rented measurement really cost you?
The Tracking Check documents what is sending today, how much of it comes from an app, and what an owned container would replace.