@ Dikaios1517

A few months ago, a nostrich was switching from iOS to Android and asked for suggestions for #Nostr apps to try out. nostr:npub18ams6ewn5aj2n3wt2qawzglx9mr4nzksxhvrdc4gzrecw7n5tvjqctp424 offered the following as his response:

nostr:nevent1qvzqqqqqqypzq0mhp4ja8fmy48zuk5p6uy37vtk8tx9dqdwcxm32sy8nsaa8gkeyqydhwumn8ghj7un9d3shjtnwdaehgunsd3jkyuewvdhk6tcpz4mhxue69uhhyetvv9ujuerpd46hxtnfduhszythwden5te0dehhxarj9emkjmn99uqzpwwts6n28eyvjpcwvu5akkwu85eg92dpvgw7cgmpe4czdadqvnv984rl0z

Yes. #Android users are fortunate to have some powerful Nostr apps and tools at our disposal that simply have no comparison over on the iOS side. However, a tool is only as good as the knowledge of the user, who must have an understanding of how best to wield it for maximum effect. This fact was immediately evidenced by replies to Derek asking, "What is the use case for Citrine?" and "This is the first time I'm hearing about Citrine and Pokey. Can you give me links for those?"

Well, consider this tutorial your Nostr starter-kit for Android. We'll go over installing and setting up Amber, Amethyst, Citrine, and Pokey, and as a bonus we'll be throwing in the Zapstore and Coinos to boot. We will assume no previous experience with any of the above, so if you already know all about one or more of these apps, you can feel free to skip that tutorial.

So many apps...

You may be wondering, "Why do I need so many apps to use Nostr?" That's perfectly valid, and the honest answer is, you don't. You can absolutely just install a Nostr client from the Play Store, have it generate your Nostr identity for you, and stick with the default relays already set up in that app. You don't even need to connect a wallet, if you don't want to. However, you won't experience all that Nostr has to offer if that is as far as you go, any more than you would experience all that Italian cuisine has to offer if you only ever try spaghetti.

Nostr is not just one app that does one thing, like Facebook, Twitter, or TikTok. It is an entire ecosystem of applications that are all built on top of a protocol that allows them to be interoperable. This set of tools will help you make the most out of that interoperability, which you will never get from any of the big-tech social platforms. It will provide a solid foundation for you to build upon as you explore more and more of what Nostr has to offer.

So what do these apps do?

Fundamental to everything you do on Nostr is the need to cryptographically sign with your private key. If you aren't sure what that means, just imagine that you had to enter your password every time you hit the "like" button on Facebook, or every time you commented on the latest dank meme. That would get old really fast, right? That's effectively what Nostr requires, but on steroids.

To keep this from being something you manually have to do every 5 seconds when you post a note, react to someone else's note, or add a comment, Nostr apps can store your private key and use it to sign behind the scenes for you. This is very convenient, but it means you are trusting that app to not do anything with your private key that you don't want it to. You are also trusting it to not leak your private key, because anyone who gets their hands on it will be able to post as you, see your private messages, and effectively be you on Nostr. The more apps you give your private key to, the greater your risk that it will eventually be compromised.

Enter #Amber, an application that will store your private key in only one app, and all other compatible Nostr apps can communicate with it to request a signature, without giving any of those other apps access to your private key.

Most Nostr apps for Android now support logging in and signing with Amber, and you can even use it to log into apps on other devices, such as some of the web apps you use on your PC. It's an incredible tool given to us by nostr:npub1w4uswmv6lu9yel005l3qgheysmr7tk9uvwluddznju3nuxalevvs2d0jr5, and only available for Android users. Those on iPhone are incredibly jealous that they don't have anything comparable, yet.

Speaking of nostr:npub1w4uswmv6lu9yel005l3qgheysmr7tk9uvwluddznju3nuxalevvs2d0jr5, the next app is also one of his making.

All Nostr data is stored on relays, which are very simple servers that Nostr apps read notes from and write notes to. In most forms of social media, it can be a pain to get your own data out to keep a backup. That's not the case on Nostr. Anyone can run their own relay, either for the sake of backing up their personal notes, or for others to post their notes to, as well.

Since Nostr notes take up very little space, you can actually run a relay on your phone. I have been on Nostr for almost 2 and a half years, and I have 25,000+ notes of various kinds on my relay, and a backup of that full database is just 24MB on my phone's storage.

Having that backup can save your bacon if you try out a new Nostr client and it doesn't find your existing follow list for some reason, so it writes a new one and you suddenly lose all of the people you were following. Just pop into your #Citrine relay, confirm it still has your correct follow list or import it from a recent backup, then have Citrine restore it. Done.

Additionally, there are things you may want to only save to a relay you control, such as draft messages that you aren't ready to post publicly, or eCash tokens, which can actually be saved to Nostr relays now. Citrine can also be used with Amber for signing into certain Nostr applications that use a relay to communicate with Amber.

If you are really adventurous, you can also expose Citrine over Tor to be used as an outbox relay, or used for peer-to-peer private messaging, but that is far more involved than the scope of this tutorial series.

You can't get far in Nostr without a solid and reliable client to interact with. #Amethyst is the client we will be using for this tutorial because there simply isn't another Android client that comes close, so far. Moreover, it can be a great client for new users to get started on, and yet it has a ton of features for power-users to take advantage of as well.

There are plenty of other good clients to check out over time, such as Coracle, YakiHonne, Voyage, Olas, Flotilla and others, but I keep coming back to Amethyst, and by the time you finish this tutorial, I think you'll see why. nostr:npub1gcxzte5zlkncx26j68ez60fzkvtkm9e0vrwdcvsjakxf9mu9qewqlfnj5z and others who have contributed to Amethyst have really built something special in this client, and it just keeps improving with every update that's shipped.

Most social media apps have some form of push notifications, and some Nostr apps do, too. Where the issue comes in is that Nostr apps are all interoperable. If you have more than one application, you're going to have both of them notifying you. Nostr users are known for having five or more Nostr apps that they use regularly. If all of them had notifications turned on, it would be a nightmare. So maybe you limit it to only one of your Nostr apps having notifications turned on, but then you are pretty well locked-in to opening that particular app when you tap on the notification.

Pokey, by nostr:npub1v3tgrwwsv7c6xckyhm5dmluc05jxd4yeqhpxew87chn0kua0tjzqc6yvjh, solves this issue, allowing you to turn notifications off for all of your Nostr apps, and have Pokey handle them all for you. Then, when you tap on a Pokey notification, you can choose which Nostr app to open it in.

Pokey also gives you control over the types of things you want to be notified about. Maybe you don't care about reactions, and you just want to know about zaps, comments, and direct messages. Pokey has you covered. It even supports multiple accounts, so you can get notifications for all the npubs you control.

One of the most unique and incredibly fun aspects of Nostr is the ability to send and receive #zaps. Instead of merely giving someone a 👍️ when you like something they said, you can actually send them real value in the form of sats, small portions of a Bitcoin. There is nothing quite like the experience of receiving your first zap and realizing that someone valued what you said enough to send you a small amount (and sometimes not so small) of #Bitcoin, the best money mankind has ever known.

To be able to have that experience, though, you are going to need a wallet that can send and receive zaps, and preferably one that is easy to connect to Nostr applications. My current preference for that is Alby Hub, but not everyone wants to deal with all that comes along with running a #Lightning node. That being the case, I have opted to use nostr:npub1h2qfjpnxau9k7ja9qkf50043xfpfy8j5v60xsqryef64y44puwnq28w8ch for this tutorial, because they offer one of the easiest wallets to set up, and it connects to most Nostr apps by just copy/pasting a connection string from the settings in the wallet into the settings in your Nostr app of choice.

Additionally, even though #Coinos is a custodial wallet, you can have it automatically transfer any #sats over a specified threshold to a separate wallet, allowing you to mitigate the custodial risk without needing to keep an eye on your balance and make the transfer manually.

Most of us on Android are used to getting all of our mobile apps from one souce: the Google Play Store. That's not possible for this tutorial series. Only one of the apps mentioned above is available in Google's permissioned playground. However, on Android we have the advantage of being able to install whatever we want on our device, just by popping into our settings and flipping a toggle. Indeed, thumbing our noses at big-tech is at the heart of the Nostr ethos, so why would we make ourselves beholden to Google for installing Nostr apps?

The nostr:npub10r8xl2njyepcw2zwv3a6dyufj4e4ajx86hz6v4ehu4gnpupxxp7stjt2p8 is an alternative app store made by nostr:npub1wf4pufsucer5va8g9p0rj5dnhvfeh6d8w0g6eayaep5dhps6rsgs43dgh9 as a resource for all sorts of open-source apps, but especially Nostr apps. What is more, you can log in with Amber, connect a wallet like Coinos, and support the developers of your favorite Nostr apps directly within the #Zapstore by zapping their app releases.

One of the biggest features of the Zapstore is the fact that developers can cryptographically sign their app releases using their Nostr keys, so you know that the app you are downloading is the one they actually released and hasn't been altered in any way. The Zapstore will warn you and won't let you install the app if the signature is invalid.

Getting Started

Since the Zapstore will be the source we use for installing most of the other apps mentioned, we will start with installing the Zapstore.

We will then use the Zapstore to install Amber and set it up with our Nostr account, either by creating a new private key, or by importing one we already have. We'll also use it to log into the Zapstore.

Next, we will install Amethyst from the Zapstore and log into it via Amber.

After this, we will install Citrine from the Zapstore and add it as a local relay on Amethyst.

Because we want to be able to send and receive zaps, we will set up a wallet with CoinOS and connect it to Amethyst and the Zapstore using Nostr Wallet Connect.

Finally, we will install Pokey using the Zapstore, log into it using Amber, and set up the notifications we want to receive.

By the time you are done with this series, you will have a great head-start on your Nostr journey compared to muddling through it all on your own. Moreover, you will have developed a familiarity with how things generally work on Nostr that can be applied to other apps you try out in the future.

Continue to Part 2: The Zapstore. Nostr Link: nostr:naddr1qvzqqqr4gupzpde8f55w86vrhaeqmd955y4rraw8aunzxgxstsj7eyzgntyev2xtqydhwumn8ghj7un9d3shjtnzwf5kw6r5vfhkcapwdejhgtcqp5cnwdphxv6rwwp3xvmnzvqgty5au