Aeroplanes, tunnels, borders
Anyone who has tried to dictate a message on the move knows the pattern, even if they never worked out the cause.
On a plane. Airplane mode is not a suggestion, and for the entire flight anything that needs a server simply does not respond.
Underground. Signal comes and goes every thirty seconds. Cloud dictation starts, loses the connection halfway, and either stalls or throws away what you said.
Across a border. Data roaming is off, because you would rather not find out what it costs. The phone works fine. The dictation does not.
Somewhere remote. Mountains, coastlines, thick-walled old buildings, basements of hotels. One bar, and one bar is often worse than none, because things time out slowly instead of failing fast.
All four have the same cause. If the recognition happens on a server, your voice has to reach it and the text has to come back, and travel is a long list of situations where that round trip does not complete.
Download the model on your own Wi-Fi
Five minutes at home saves an afternoon of frustration, and all of it happens before you leave.
Fetch the model while you are on Wi-Fi, and check that it finished. Discovering an incomplete download once you have no signal comes far too late, and an airport queue is the wrong place to find out. Pick the size deliberately: the 190 MB middle option suits most phones, the 60 MB one is better on an older handset or when battery matters more than accuracy, and the 539 MB one is for when you want the best transcription and have the storage to spare. Measured on a 4 GB test phone, the middle size needed 4.1 seconds for 6.9 seconds of speech.
Add the words you will need: the people you are travelling with, the town you are staying in, the airline, the street the rental is on, anything the recogniser has never encountered. Those stay on the device and get handed to the speech model as context.
Then sit on your own sofa, put the phone in airplane mode and dictate one sentence. It takes ten seconds and it tells you for certain that nothing in the chain is quietly depending on the network.
No request to fail at 30,000 feet
Move the recognition onto the handset and nothing on that list is an event.
LocalType keeps the speech model as a file on the phone. You speak, the phone does the work, the words appear. There is no request to fail, no timeout to sit through and nothing that behaves differently in the air than it does at home. Internet access exists in the app for one purpose, collecting the model you chose, and afterwards it never asks.
That turns a flight into usable time. Notes, replies that will send the moment you land, the message you have been putting off since Tuesday: all of it works with the phone in airplane mode, and it queues up to go out when you reconnect.
Roaming is the same property showing up as money. Cloud dictation uploads the recording, and a recording is a great deal bigger than the sentence it becomes. Dictate a few times a day on a metered connection and it quietly adds up. It will not bankrupt anybody, but it is a stream of small charges for a task that did not need to leave the phone. On-device recognition uploads nothing, so your allowance is untouched by dictation whatever your plan is and whichever country you are standing in.
Ordering in one language, messaging home in another
Travel is where one distinction starts to matter.
LocalType transcribes eighteen languages and works out which of them you are speaking from the recording itself, so switching between them needs nothing from you. Order in one language, message home in another, and each comes out as whatever you actually spoke.
Translation is not part of it. It writes down the language you used. If you speak German into it, you get German text, not English. Dictation and translation get muddled constantly, and expecting the wrong one leads to a confusing afternoon.
The practical value on a trip is that you do not have to go into a settings screen every time you switch. Pin it to a specific language instead and the keyboard layout, the dictionary and the dictation language all move together, which is useful if you are writing in one language for a whole week.
Accuracy is not identical across all eighteen. Speech models are trained on uneven amounts of material, and widely spoken languages fare better.
Battery, which matters more away from a plug
Travel days are long and charging opportunities are unpredictable.
Local recognition uses your processor, so it does consume battery while it runs. The mitigating detail is that it only runs while you are actually dictating, which for most people totals a few minutes across a whole day, and it does not need the radio at all. Cloud dictation keeps the network active, and the radio is one of the hungriest components in the device.
If you are worried about it, the smaller model does less work per sentence. On a long travel day with no charger in sight, that is a reasonable thing to switch to.
Dictating where you would rather not be overheard
A quieter travel problem that has nothing to do with signal.
Trains, shared taxis, hostel common rooms and aeroplane seats are places where saying a message aloud is awkward regardless of the technology. Dictation does not solve that, and no app can.
What it can do is make short bursts practical. You say one sentence quietly and never deliver a paragraph to a carriage. The microphone is a key on the keyboard, not a separate app, so starting and stopping is a single tap of the thumb, and there is no full-screen dictation panel announcing to the person beside you what you are doing.
For anything genuinely confidential, thumbs remain the answer. The advantage of having both in one keyboard is that you can switch between them mid sentence without leaving the message.
The quieter reason this suits travel
Travelling means using other people's networks. Hotel Wi-Fi, an airport hotspot, a café that wants your email address first.
Dictation that does not transmit is simply not part of that picture. There is no audio crossing an unfamiliar network, no account attached to the keyboard, no advertising in the product, and no archive of your recordings kept anywhere. The backups skip the app on purpose, and the model file cannot be opened by anything else on the phone.
Nothing about that is specific to travel. It just happens to matter more when every network you touch belongs to a stranger, and when the messages you are writing are about where you are staying and who you are meeting.