Maps

This is the most obvious and most frequently overlooked item. A standard mapping app allows you to download specific areas for offline use, and you should do this for your city and the routes you travel. There are also apps built on open mapping data that work entirely offline by design, meaning they download the entire map of a region and then do not require the internet at all, including for route planning. The second option is more reliable specifically during prolonged outages because it does not depend on whether the app has managed to update its temporary data. You should download not only your own city but also neighboring regions, since it is precisely when traveling that a lack of connectivity causes the most problems.

Translation

Translation apps allow you to download language packs for offline use. You should download English and the languages you use, and you need to do this in advance because downloading a pack without the internet is no longer possible. The offline version works worse than the online one, especially with long texts, but it is perfectly sufficient for individual words and short phrases.

Reference Information

Here is a tool that few people know about, even though it solves an entire category of problems. There is a free, open-source program that allows you to save entire websites for offline viewing, and its best-known use is saving an encyclopedia. Here is how it works. You install the program, download an archive of the required resource in a special format, and then use it like a regular website, with search and navigation between pages. The sizes vary. The full English-language version of the encyclopedia takes up tens of gigabytes, the Ukrainian-language version is considerably smaller, and there are also abridged versions containing only article summaries. In addition to the encyclopedia, the project's library contains other useful archives, including medical reference guides, collections of questions and answers for technical fields, and collections of openly accessible books. For a laptop, this is a real opportunity to have a reference database with you that does not depend on either network connectivity or your router's battery charge.

Documents

Check whether your important files are available offline. Cloud storage services have a feature for saving individual files for offline access, and it is disabled by default for most documents. It is also worth keeping copies of key documents directly as files in your device's memory, rather than only in the cloud. I wrote about organizing such an archive in a separate article. This also includes work materials that you can work on without a connection, such as text documents, spreadsheets, and presentations, since office applications allow you to edit them offline and synchronize them later.

Neural Networks That Work Offline

Language models can be run directly on your own computer, without any internet connection. There are programs for this purpose that download a model to your drive and then run it entirely locally. Some options have a graphical interface for people who do not want to deal with the command line. The advantages are obvious. It works offline, transmits nothing externally, and costs nothing. However, it is worth being honest about the limitations. Models that fit on a regular laptop are noticeably weaker than those that run in the cloud, meaning they reason less effectively and make up facts more often. I wrote separately about the mechanics behind these errors, and the problem is more pronounced with local models. A sufficient amount of RAM is required, with eight gigabytes being a realistic minimum and sixteen or more being comfortable. Running a model puts a significant load on the processor, meaning that on a laptop running on battery power, it noticeably reduces battery life. The practical conclusion is this: a local model makes sense as a backup tool for explanations, wording, and working with text you already have, but not as a source of facts or a replacement for a full-fledged assistant. Such solutions also exist for phones, but the limitations are even stricter, and running a model on a phone during an outage is usually impractical specifically because of the battery consumption.

Media and Learning

Download the content you will use to fill your time offline, because during a prolonged outage, the worst feeling does not come from the darkness but from time standing still. Podcasts and audiobooks are convenient because you can listen to them with the screen turned off, meaning they consume very little battery power. Music for offline listening is available through subscriptions to most services. Books in a reading app. Videos and courses, if the service allows downloads. Learning materials, if you are studying something.

What Else You Should Set Up

Turn on power-saving mode and find out in advance exactly what it disables, so you do not have to figure it out in the dark. Disable automatic app updates over the mobile network, because otherwise your data allowance will disappear without you noticing. I wrote about this in an article on saving mobile data. Download an offline version of an app that provides outage schedules, if one is available, or simply save your schedule as a screenshot. Write down key phone numbers on paper, because your phone may run out of battery precisely when you need a number. Check whether your phone has a built-in radio receiver, since some models have one and it works without the internet while consuming minimal battery power.

About Offline Messengers

There are apps that allow you to exchange messages without the internet, using direct connections between devices over wireless channels. It is worth having realistic expectations about them. They work only over short distances and only when the person you are messaging also has the app and is nearby. In other words, they are a tool for situations where you and someone else are in the same building, not a replacement for regular communication. I wrote separately about what actually works for staying connected during outages, and the main rule there is that regular phone calls and text messages remain available longer than mobile internet.

How Much Space Will This Take Up?

It is worth estimating this in advance because free storage space runs out faster than you might think. Regional maps take up anywhere from hundreds of megabytes to several gigabytes. Translation language packs take approximately a few hundred megabytes each. An abridged encyclopedia takes a few gigabytes, while the full version takes tens of gigabytes. A local language model takes anywhere from a few to tens of gigabytes, depending on its size. Media storage depends on how much you download. Altogether, this can easily amount to tens of gigabytes on a laptop, so check your available space before you begin, and remember that a full storage drive can slow down the system on its own.

Sources

Materials on offline access to the encyclopedia through the open-source Kiwix project, and reference information about offline modes in mapping and translation apps.