Decide what belongs in your offline kit
Start with one sightseeing day. List the map area, Tour, narration, accommodation address, return instructions, tickets, and documents you will need. A downloaded map and an audio guide do different jobs: one provides geographic context, while the other explains the places you visit. Neither automatically saves the other.
Storage depends on the files actually included. A larger map area, more images, or additional narration can change the total. Existing cached files can reduce the extra space used by a later download. This guide reports no measured download sizes and gives no city-by-city MB or GB estimates.
Prepare the Travvy Tour before measuring
Create and review your Tour while connected. Request audio separately after the route is ready, and wait for generation to finish before downloading. Plus subscribers and Tours created with a Tour Pack are eligible for offline downloads of available Tour assets, including available cover images, stop photos, and generated audio.
These media downloads do not include a complete offline street-map package or offline route recalculation. Prepare a separate offline-capable map for navigation and test saved Tour details on your phone. Trips organize multi-day plans, but full Trip downloads are not available. Do not assume that opening a Trip once saves the entire itinerary.
Run a before-and-after measurement on Wi-Fi
This is a method for you to run, not a benchmark we have performed. Record your phone model, operating system, app versions, test date, exact map area, and Tour title. Avoid unrelated downloads, camera use, and app updates during the test. Use the same storage screen and unit for every reading.
Record free storage as A. Download one map area in your map app and wait until complete; record free storage as B. Download the prepared Tour assets and record free storage as C. A minus B is the observed extra space after the map; B minus C is the observed extra space after the Tour. Record A, B, C, both differences, and anything already downloaded.
Wait for the storage display to refresh between readings. Background caches and system cleanup can affect the numbers, so a negative or unexpectedly small difference is not proof of a tiny download. Repeat under steadier conditions or compare the app’s own storage display if it provides one. Report the result as a device-specific observation, not a guaranteed file size.
Make space without removing the files you need
Review old map regions, finished Tour downloads, and large media you no longer need locally. Use the relevant app’s download controls where available. Do not clear all app data or uninstall a guide as a casual cleanup step: you may remove saved content or need to sign in and download again.
Keep some free capacity beyond the measured set for new photos, temporary files, and updates. The right margin depends on your phone and travel plans; there is no single safe allowance for every traveler. Recheck available space after preparing all destinations, not just the first city.
Test the real offline day
Turn on airplane mode and explicitly turn off Wi-Fi, which can remain enabled. Reopen your map and Tour, inspect the intended stops, and play the audio you plan to use. Check the map area around your arrival point, accommodation, and return journey as well as the sightseeing route.
A location dot does not prove that the map or audio is stored locally. GPS can work without mobile data, but location permission and reception still matter. If a needed item fails, reconnect and fix it before leaving. Repeat the test after changing a route or adding audio; an earlier download cannot prove that later content is available.
Keep live checks and connectivity separate
Creating plans, requesting changes or new audio, asking Ask Travvy, and downloading content require a connection. Check today’s opening hours, transport, entry conditions, and bookings while online. Save essential confirmations separately in a format you can open without fetching them again.
If mobile data fails abroad, check your carrier’s plan and destination coverage, selected SIM or eSIM, activation, and required roaming settings. Confirm possible charges before enabling roaming. Offline preparation helps you keep exploring through connection gaps; it does not diagnose your carrier account or keep saved information current.