Travel

What travel apps are worth building?

Travel plans change. Flights move, rules change and a plan made a week ahead can be wrong on the day. That makes single-question tools a better first build than full trip planners, because they need less data to stay correct and can give a checked answer at the right moment. Three shapes fit:

• Connections: whether a layover is long enough to leave the airport, given the terminal, the border step and the time needed to return.
• Arrival plans: a one-screen plan for the first hour in a city, from the landing time, the transport options and the luggage.
• Trip checks: the documents, permits and vaccines one trip needs, linked to official sources the traveler can open.

Whichever row you pick, the first build is the one whose source you can open and quote in the answer. If the only source is a forum post, the answer is not ready to show anyone.

Who uses travel apps, and how do you reach them?

Many travelers open a travel tool only on the day they need it. That makes search and sharing the main channels, and a short answer page for one specific question is easier to find than a broad destination guide. Reach travelers where that question is already asked: forums for a particular airline or airport, city communities and the groups for a specific route.

Tell me about the last connection you were nervous about. What did you check, where did you check it, and what did you still not know?

Count the answers that name a specific gap, such as an unknown transfer rule, rather than general worry. Those gaps are the product.

What makes a travel idea good?

A good travel idea answers one question on the day it matters, and it says what it does not know. Check each idea against this list:

• It answers one question with a clear result and a reason for it.
• Its answer depends on inputs the traveler has to hand, such as a flight number, a city or a passport country.
• It shows where its data came from and when that data was last checked.
• It states what it does not cover, such as rules that depend on nationality or on a change on the day.
• It does not sell a booking until the answer has been shown to be useful.

What does a small first version look like?

Hypothetical example: a layover check for one airport. The traveler enters the airport, the arrival and departure times and their passport country. The page returns an estimate of the time needed to leave the airport and return, the steps it assumes and a note that queues and terminal distances vary. It books nothing and links to the airport’s own transit information.

Build the time estimate from published timetables and transit information you can cite, not from a guess. Test it by asking ten travelers, after they land, how close the estimate was. The version is ready when most answers fall within the time the traveler reported, and the misses are logged with a cause you can fix.

What goes wrong with travel apps?

• Stale schedules: a timetable or terminal map that is weeks old gives confident wrong answers. Show the check date on every answer.
• Entry and visa rules: these depend on nationality, destination and sometimes the day. Link to the official source and do not summarize the rule as a fact.
• Disruption on the day: strikes, weather and closed terminals change plans. An app that is right on a normal day can mislead on a bad one, so say what it cannot know.
• Airport and airline differences: baggage, transfer and terminal rules vary between airports and carriers. One rule applied everywhere will be wrong somewhere.
• Commission: a page that answers a question and then sells a hotel or ticket mixes two trust relationships. Disclose any commission and keep the answer independent of it.

Where should you start with a travel idea?

Two ideas on the board asked the same layover question when this page was written: Layover planner: can I leave the airport? and Can I leave the airport during this layover?. Pick one, build the single-airport version from the worked example, and then check whether the other still makes sense as a separate product.

Border queues or the first hour after landing in a new city are other single questions a tool could answer: submit one. A builder can scope the work with weekend project ideas, then use the validation guide to find out whether travelers return to a tool they used once.