A practical solution is to create your own repeatable reference point rather than rely on an app alone. Use a fixed physical reference at the location—such as a railing post, fence, tree position, or another object you can place the phone against or line it up with each time. Then keep these consistent:

• stand in the same spot
• use the same zoom level
• focus on the same subject with the same focus point
• use your phone’s pitch/roll or level indicator if available
• note and reuse your exposure settings when possible

Even with careful technique, a handheld setup won’t match perfectly every day. Expect to do a little alignment and cropping afterward when assembling the timelapse.

So, while a ghost-overlay app could help if you can find one for your phone, the more reliable method is a repeatable physical reference plus consistent shooting settings, followed by minor post-processing alignment.