• -Your other devices (if, e.g., you have an iPhone and iPad), can receive your notes/attached content
• -Your notes and content are backed up (in case you lose/damage your device or buy a new one, your content can be restored)
• -If you share your content with other Nandemo users, they can receive it in their app.

• -You can air-drop your Note and any attached media/documents to your Mac so you can edit it there.
• -You can email your Note and its attached media/documents to anyone (including yourself).
• -You can send this via iMsg, WhatsApp, etc.

• Restore is intended for users who already have an active paid subscription associated with their Apple ID and want to activate that subscription on a new device or reinstall the application.
  In this case, the app retrieves the subscription information from Apple's servers and reactivates the user's existing subscription without requiring a new purchase.
• Renew is intended for users who want to purchase or re-purchase a subscription plan. This includes cases where:
  The user's subscription has expired and they wish to continue using the same plan.
  The user wants to increase their storage/data allocation by selecting a different plan.
  The user intentionally chooses to purchase a plan again while their current subscription is still active.
  

• -Our server/code executing on our server
• -Employees of Tessellation Software
• -Amazon (where we host our servers)
• -Any hacker (in the extremely unlikely event our servers are hacked)
• -Any government

• Encrypting your notes/attachments with its random password.
• Doubly encrypting your note/attachments with a separate padlock password.

• Encrypting your notes/attachments with its random password.
• Doubly encrypting your note/attachments with a separate padlock password.

• Strengthens the global password used to encrypt all Notes and attachments to these Notes. The App generates your global password from your App password and PIN, and it is this global password that protects the individual unique passwords that are randomly generated for every Note and for every attachment/Media item attached to your Notes. If you do not assign a PIN, then only your App password protects the passwords to all your non-padlocked Notes and their attachments. Often the App password is stored in your KeyChain, but the PIN you choose isn't stored anywhere.
• Enables your app to lock if unused for a specified time period when left running in the background. (Otherwise, if app is left open in the background, anyone who grabs your unlocked phone can access your Notes that aren't padlocked.)
• Very important if you are using words for your app password: Attackers often store words/combinations of words to run through automatically when guessing user passwords. Having a PIN in addition greatly strengthens your security.

• Pros: Usability: You can unlock your app simply by unlocking your phone.
• Cons: Security: If your Keychain (device password) is compromised, people will have access to your Notes (unless you have the PIN).
(You can always Padlock your most sensitive Notes for additional protection.)

• When you onboard for the first time, Nandemo generates a public-private key for you and sends your public key to Tessellation (which Tessellation validates via OTPs sent to phone and email). Tessellation has every user's validated public key (but only user has access to his/her private key).
• When you share a note with another user, the specific password for the note you are sharing (and the passwords for any attachments) are encrypted with the shared-with user's public key.
• When the shared-with user syncs and accepts your offered note, they also receive the password for the note (and the passwords for any attachments) encrypted with their public key, which the shared-with user can decrypt with his/her private key.
• Thus both you and the shared-with user have access to the password(s) of all you have shared, where Tessellation's servers only have access to the same said passwords in a form where these are encrypted with your key and with your shared-with user's key.
• If you share with multiple people and withdraw sharing from one of the users previously shared with, Nandemo will change the 501-byte password for the note (and its attachments) for everyone (so that the previously shared-with user no longer can decrypt future versions of the note [even if he/she somehow gains access -- which, in any case, is extremely unlikely due to great technical difficulty of doing so]).
• Technical: As a precaution (and for performance), the keys on the server are only temporarily encrypted with a shared-with user's public key. When the shared-with user receives the password(s) for notes/attachments in a form that is encrypted with their public key, they immediately decrypt this(/these) password(s) and re-encrypt with their own app password and PIN and send this back to the server. Thus, for the user's own records (and, eventually for shared records) the server only has passwords encrypted symmetrically with each user's app password and pin.

• Your username
• The last name and first name you provide, although, currently, we don't validate that you are who you say you are. (This level validation is planned in the future and will be optional. You may want to take advantage of this when it is available because, when we offer digital signing and verification [planned], we will be able to verify for others that content was authored by you [and not just by someone who owns the particular email address and phone number that is associated with your username, which we do validate].)
• Email and phone number -- Kept encrypted on our servers)
  (Both your email and phone number are validated via OTP when you onboard, and are important to the functioning of our app as explained below.)
• City and Country. (Currently this is not validated)
• Broad-based usage statistics (e.g., which View you use: Classic or Category), but nothing tied to content.
  (Helps us to know what features are in use and are important to focus on for enhancements.)
• Your self-declared 5 year age range
  (Helps us know what features are important to which group)

• Select a note you wish to padlock from the Preview screen, or click 'Done' on the keyboard after creating/editing the note (to go to 'View Note' mode)
• Select the 'Padlock ' icon.
• Enter your chosen padlock password (of at least 9 characters) twice and press 'Secure'

• Your content is doubly encrypted. To decrypt it, you need both the padlock password and access to the randomly generated password for the note (and to each randomly generated password for any attached media/documents).
• Nandemo -- on your devices only -- has access to the randomly generated passwords for all your notes and attached documents by decrypting these with your app password and PIN when you open the app, but, what if someone gets access to your device with Nandemo already open? They could then view any non-padlocked note just as you can.
• Nandemo does not store your padlock password anywhere.
• Padlocking a note also prevents someone who grabs your phone from deleting it. (To delete a padlocked note from your device without opening it, when someone slides left on the note in the Preview Screen and presses 'Delete', an OTP sent to both phone and email is required in order to delete the note. [This capability -- to delete a padlocked note without knowing the padlock password -- is provided in case you, yourself, forget the padlock password and wish to delete the note. In some competing apps, you are stuck with this padlocked note that you can't open forever, because there is no way to delete it.])

• Category View: With all its innovative capabilities, including:
  -Its flat structure -- far superior to folders/sub-folders (see ahead for a fuller explanation);
  -Capability to collapse/expand BOTH sub-categories () and its own notes ();
  -Colors: Ability to assign colors to a category/sub-category and then to filter on color;
  -Sort Order: And, particularly, the unique 'Custom' sort order enabling specified order of notes within categories/sub-categories.
• Sorting Capabilities: In addition to the types of ordering provided by most notes apps (by modified date or alphabetically by title), Nandemo provides its unique 'Custom' sort order that lets you put your notes in any specific order you choose. This ordering -- established by dragging Notes around while in Classic (List) View -- is respected in Category View (i.e., your notes within any category/sub-category will be in the same relative order they were left within the overall set of notes if you choose 'Custom' Sort Order while in Category View).
• Keyword Tagging: While many competing apps provide Keyword Tagging, Nandemo's capability to use these tags in isolation of other criteria when searching/filtering position Nandemo at the top of its peer group (see ahead).
• Global Search AND Global to Local Search Integration:
  • Global Search capabilities: Unlike most competitors, Nandemo enables you to search for just notes that are tagged with a particular Keyword Tag. Most other apps will return BOTH the notes with any occurrence of the word your are searching for AND those containing the Keyword Tag, which is often not what you are looking for when you are trying to pull specific notes together. Nandemo, like competing apps, does offer you that search capability i.e., to search for BOTH notes that are so tagged AND those containing the word that is the tag, but addtionally enables you to search for only those notes specifically tagged with that Keyword Tag. Of course, Nandemo also enables you to search for all occurrences of any word throughout your notes.
    To summarize, you can perform a global search for:
    -Just Notes tagged with a Keyword (Not a capability of most apps)
    -All notes containing a word (showing occurrences of a word across all notes)
    -All notes EITHER tagged with a keyword OR containing that word.
  • Global to Local Search Integration: Within a note you can perform a "Local Search" for any word or phrase within that note and this is common among notes apps. However, what is not common is the seamless transition that Nandemo provides between Global and Local search, whereby, after performing a Global Search based on a word (not a Keyword Tag search), when you select a particular Note, Nandemo immediately puts you in Local Search mode -- where that word is selected and now you can jump to occurrences of that word within the note you selected (without having to redo the search [and re-type the word] locally).
    We sweat the details so you don't have to!

• Category View: This is where Nandemo provides many of its unique organizational capabilities. In this View, notes are in their respective Categories and Sub-categories (or are 'Uncategorized').
  Some of the capabilities provided by this innovative View:
  • Flat structure: Because all Notes are accessible from the top-level of the Preview Screen -- no matter how deep in different parts of the Category/Sub-Category hierarchy two notes are -- having this View allows you to jump from Note to Note with just two presses: going back to this Preview Screen and selecting the other note of interest. Compare this with the folders/sub-folders offered by many competing apps: With folders/sub-folders, if you wish to jump between two or more notes in different folders of a deep folder hierarchy, you have to "drill down" to the sub-folder of one note and open that, then go back to the top of the hierarchy and drill down to another. (Of course, you could use their equivalent of our Classic View, where all Notes appear in a flat list. But then, related notes would not be in their folders/sub-folders and mightly arbitrarily far apart.) (Some of our major competitors don't even offer folders/sub-folders but provide only a 2-level hierarchy where notes can only be in the bottom level of that hierarchy.)
  • Collapsable Categories/Sub-Categories: This View provides 2 ways to collapse Categories:
    1-At any level, a category or sub-category can be collapsed (or expanded) with the orange triangle , enabling you to hide all its sub-categories beneath it (and, obviously their sub-categories and notes to the bottom of the hierarchy).
    2-The black triangle on any categories/sub-categories remaining enables you to hide or expand the notes within this category or sub-category.
  • Colors and Filtering Categories by Color: You can assign a color to a Category or Sub-Category^* and then filter to see only Categories/Sub-Categories of a particular color to bring categories/sub-categories that would otherwise be far apart, close together with all their notes.
    ^*If you assign a color to a catgory or sub-category, all its children also are assigned that color (because, if a sub-category had a different color than its parent [or parent's parent], it would have the undesirable effect of enabling a user to filter by a color and see a parent category without all its children). Therefore, if you wish to assign different colors to sub-categories of a parent category/sub-category, the parent should not be assigned a color.
  All of the above capabilities, and particularly the aforementioned "flat structure", enables you to quickly access the notes you need for a particular task available within 2 screens of each other and having these notes close to each other, thus enabling you to move among these notes with the fewest possible key presses or screen traversals. (You can read one Note; go back to the common [Preview or Search] screen and select another note no matter where these notes live in your hierarchy. Using all the capabilities mentioned, you can have any set of notes close to each other on this "common" screen at any given time.)
  
  
• Classic View: All notes appear in a list in the Preview Screen (outside of any Categories/Sub-Categories). This view (common to most notes apps) enables you to see all your notes in a list in any of the 3 sort orders mentioned below. What distinguishes the Nandemo App with the others is the use of this with the 'Custom' Sort Order mentioned below. While some other apps offer "pinning" where you can "pin" one or more notes to the top (and their 'Modified Date' and 'Alphabetical by Title' sort orders would then apply separately to those notes "pinned" or "not pinned"), with Nandemo's provided 'Custom' Sort Order, you can drag the notes to put these in any order you wish.
  Importantly, this order is respected when you switch to Category View (and this is how you set the order for Category View). In Category View, when 'Custom' Sort Order is chosen, the order of the notes that are in a particular category or sub-category will be the same order that these notes are relative to each other when in Classic View.

• By Modified Date and Time: Notes most recently modified to notes least recently modified.
• Alphabetically by Title: Sorts notes by ascending alphabetical titles.
• Custom: Allows you to put your notes in any order you desire. Custom Sort Order is far superior to the "pinning" offered by competing apps. With "pinning" you can send any notes you wish to the top (where most apps respect the sort order [modified date, or alphabetical by title] within both the "pinned" notes [if more than 1], and, separately, in non-pinned notes). But Nandemo's Custom Sort Order goes further: It enables you to put the Notes in any order you choose.
  Changing or setting up the relative ordering of notes is always accomplished in Classic View, but the order you set is respected when you switch to Category View (such that the ordering of notes in a category or sub-category is the same as the relative order these notes are with each other in Classic View).

Press the three vertical dots menu on the top right to see the options for how to organize your notes. Please refer above section for the details.

• Internal Sharing: Here, you can offer a Note and its content to any other user of Nandemo, and this Note is shared heavily encrypted (with the Note and every piece of content attached to the Note having its own randomly-generated password). Even though the Note is shared through our server with other Nandemo users, Tessellation has no access to it or its content. Further, you may set unique permissions on this shared Note and its contents with each user you share with:
  • Read Only OR Read/Write
  • Permission to Receive prior versions (if a Note has history on) or only the latest
  • Permission to Extract (see 'External Sharing' below), or deny that permission.
  Note versioning and history capabilities during collaboration: An especially useful feature if, as the onwer, you turn history on for a Note, is that, if you share a Note with others internally with read-write permission, you can always replace their version with a prior version if you don't like their changes.
  If a shared-with user does not have 'Permission to Extract', they will also not be able to take a screenshot of the Note you have shared with them.
• 
  External Sharing (aka 'Extracting'): Here, you can offer a Note and its contents outside of Nandemo with others who are not using Nandemo. A .zip file is prepared and sent via iMsg, AirDrop or in any other manner that Apple provides for sharing. This .zip file has:
  • The Note itself (including header information^*) as a .rtf file editable with WordPad or Microsoft Word on a PC or TextEdit App or Microsoft Word on a Mac.
  • The Note content as a .txt file (without any of the rich text formatting [if any was included])
  • For each attached media/other content, a separate file with each item of content (e.g., a .jpg) along with a separate file of the same name containing header information^* for each said item of content attached to this Note.
  
  ^*header information: This information includes the Title of the Note; who the owner is; information of the user who edited this version of the Note (which would always be you unless you shared with read-write permission); and, the date and time the Note was modified.
  
  If you share a note within Nandemo, you can prevent the shared-with user from extracting as already mentioned.
  
  You can externally share with yourself so that you can edit a Note on your Mac or PC.
  
  

Please see below video how to revert a note to a prior version.