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Marriage Planner App or Wedding Planner App?

A marriage planner app and a wedding planner app are not quite the same search. Here is what each term actually means, and which one you need.

Juan Bajo, Founder, PlannedBy·2 November 2026·6 min read
A phone and an open notebook laid out side by side on a desk for planning a wedding
Photo by Gabrielle Henderson on Unsplash

A marriage planner app and a wedding planner app both get typed into the search bar looking for the same thing: help running the wedding day, not the legal marriage.1 Typing the wrong one costs nothing, because both terms return the same style of tool - the cost shows up later, if you go looking for an app that handles the legal paperwork and find that no such tool exists.

"Marriage" is the legal word. Australian law and the Attorney-General's Department use it for the paperwork: the Notice of Intended Marriage, the marriage certificate, the marriage celebrant.12 None of that paperwork runs through an app. It runs through your celebrant and the registry directly.

"Wedding" is the event word, and it is what every planning app on the market actually plans. The guest list, the seating chart, the budget, the vendors, the day-of run sheet - the celebration, not the certificate.

Marriage The legal act Wedding The day itself

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What does "marriage planner app" mean?

Most people typing "marriage planner app" mean exactly what someone typing "wedding planner app" means - the results that come back are the same apps either way. A smaller group means something narrower: the legal process itself, which has its own fixed rules. A Notice of Intended Marriage must reach an authorised celebrant not earlier than 18 months and not later than one month before the wedding.2 Three marriage certificates get signed by the couple, the celebrant and two witnesses over 18 on the day itself.1 None of that is a scheduling problem an app solves - it is a paperwork deadline tracked with your celebrant.

Where "marriage planner app" gets typed into a search bar:

  • "She searched marriage planner app expecting the same results as wedding planner app, and got them."
  • "He downloaded a marriage planner app hoping it would track the Notice of Intended Marriage deadline."
  • "The listing called itself a marriage planner app, but the screenshots showed a guest list and a seating chart."
  • "Her mother used the phrase marriage planner app for the whole process, paperwork included."
  • "We assumed a marriage planner app would flag the celebrant's notice deadline for us; none of them do."

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What does "wedding planner app" mean?

"Wedding planner app" is the accurate term, and the market already agrees on it. Among the US App Store's largest wedding-planning apps by ratings count, the leaders carry the word "wedding" in their own product name - The Knot Wedding Planner and Wedding Planner by WeddingWire among them.4 None of the five largest calls itself a marriage planner. What these apps do is the event side of the day: the guest list, the seating chart, the budget, the vendors and a run sheet for the hours themselves.

Where "wedding planner app" gets typed into a search bar:

  • "A wedding planner app should hold the guest list, the seating chart and the day-of run sheet in one place."
  • "We compared three wedding planner apps before picking the one that let vendors see their own schedule."
  • "The venue coordinator asked which wedding planner app we were using, so she knew what format the run sheet would arrive in."
  • "Our celebrant does not use a wedding planner app at all - she works from a printed run sheet."
  • "Most wedding planner apps charge once for the wedding itself, never every month for the marriage."

Which should you use?

If you're searching for...Use
The guest list, seating, budget, vendors or a day-of run sheetA wedding planner app
The Notice of Intended Marriage, your celebrant or the certificateYour celebrant or the registry directly, not an app
Top wedding apps by App Store ratings 0 Call themselves a marriage planner app

The legal process itself is named "marriage" - the Marriage Act, the marriage certificate, the Notice of Intended Marriage21 - which is likely why the word carries into search even though every major app answers to "wedding".4 Decide which question you are actually answering: the paperwork, or the party?

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PlannedBy is a wedding planner app in exactly that sense: one run sheet, a seating chart tied to the guest list, a budget and the vendors, all built for the day itself. See how PlannedBy works. It does not touch the Notice of Intended Marriage or the certificate - that stays with your celebrant.

Frequently asked questions

Is a marriage planner app the same as a wedding planner app?

For almost every searcher, yes - both phrases return the same style of app, and the leading products answer to "wedding" in their own name.4 The real difference is the legal paperwork, which no planning app handles.1

Does any app handle the Notice of Intended Marriage?

No. It has to reach an authorised celebrant between one and eighteen months before the wedding, managed directly with your celebrant, not through a planning app.2

Why do people search "marriage" when they mean the wedding day?

Because the legal vocabulary uses "marriage" everywhere - the Marriage Act, the marriage certificate, even the Australian Bureau of Statistics' own release, "Marriages and Divorces, Australia."32 Some of that word carries into a search for help with the event itself.

Which one does PlannedBy build?

A wedding planner app: the run sheet, the seating chart, the guest list, the budget and the vendors. Not the legal paperwork.

Do I need both an app and a celebrant?

Yes - they are not substitutes. The app plans the day; the celebrant and the registry handle the Notice of Intended Marriage and the certificate.1

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Sources

  1. Get marriedAttorney-General's Department (Australia)2026-08-16
  2. Marriage Act 1961 (Cth), Compilation No. 34, section 42Federal Register of Legislation2026-03-28
  3. Marriages and Divorces, AustraliaAustralian Bureau of Statistics2026-07-28
  4. iTunes Search API - wedding planner apps, US ratings countsApple2026-08-15

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