Frequently Asked Questions



No, Timeline Eons is self-contained. The main timeline events come with the app itself.

The app can download additional RSS events. This however is an optional feature. If turned on, then the download takes place whenever your device is connected to the internet.

In addition to a basic image, some events play sounds or movies. Those are streamed from a server whenever your device is connected to the internet.


Every effort is made to maintain the dates as accurate as possible. Please note that:

  • All prehistoric and future dates are subject to margins of error. For example, the age of the Earth is 4.54 billion years ± 1%. It is acceptable when different sources use slightly different dates that fall within the same margin of error.

  • As new discoveries are made, some dates get recalculated or refined, which is normal. For example, before the discovery of radioactive decay, the age of the Earth was calculated in the 19th century to be between 20 and 400 million years old, while modern radiometric dating provides definite evidence of a much older Earth. This timeline attempts to use the most recent dating and the latest evidence.

  • Some dates depend on the definition of their events. For example, animal domestication can be defined as either taming animals or controlling their breeding. Each definition entails a different date. This timeline usually adopts the broadest definitions and earliest dates. Use the app's external links for additional details. If necessary, edit the events and dates according to your own particular definitions.

To suggest date corrections, please contact us.


The main objective of Timeline Eons is to paint a big historical picture and to cover billions of years of natural and human history. While most other history resources narrowly focus on a single subject and can offer more regional details, Timeline Eons is ideal for displaying major events in a comprehensive context, offering a rounded education and revealing important historical connections.

Because it is impossible to cover every possible historical event while maintaing a practical app, Timeline Eons attempts to cover as many major events as possible, leaving it up to individual users to add events related to their own particular regions and specific interests.

To suggest improvements, please contact us and include specific events that can benefit most other app users.


Yes, support for multiple timelines was added in version 1.2.0. If you have an older version, download the latest from the App Store.

To create a new timeline:

  • Tap and hold the timeline (the purple bar over the events).
  • Tap the Timeline button.
  • In the Timeline List page, tap the plus (+) button.


Tap the app's information button (i) for details.


Yes, support for custom backgrounds and fonts was added in version 1.2.0. If you have an older version, download the latest from the App Store.

To edit the timeline's appearance:

  • Tap and hold the timeline (the purple bar over the events).
  • Tap the Timeline button.
  • In the Timeline List page, tap the desired timeline and then edit its appearance settings.


iCloud has two main functions:

  • Back up files.
  • Sync multiple devices.


To back up Timeline Eons via iCloud:

  • Launch the Settings app.
  • Select iCloud.
  • Tap the Storage & Backup button.
  • Tap the Manage Storage.
  • Tap the button with your device's name.
  • Turn on the switch next to Timeline Eons.

Note that it is not possible to restore iCloud backups one app at a time. If you lose data, then it is necessary to restore the whole device.


As for syncing multiple devices via iCloud, Timeline Eons does not use this feature because of the app's size and some iCloud reliability issues. This might change in the future. In the meantime, you may use the Export button under the Settings tab to export your events, then use the Import button to import them into another device.


Yes, while factory events are in English, users may enter custom events in any language:

  • In the Settings app, select General and enable the keyboard of any language.
  • When entering text in Timeline Eons, tap the keyboard's Globe key to switch to other available keyboards.

If you create or view events from the Tools section of this website, change the default encoding of your browser to unicode.


There are these issues that make public sharing difficult:

  • Copyright: Some resources, such as images, are subject to copyright laws and therefore cannot be shared publicly.

  • Accuracy: There are many users that have a subjective take on history, such as those who believe that the pyramids were built by aliens.

  • Relevance: Most users use timelines to track personal events that do not interest others (family birthdays, local events, etc.).


However, feel free to initiate contact with other timeline users via the comments at the bottom of webpages, then use the app's Export and Import functions to share events with them. If this takes off, it would drive the development of new app and website features.


Developing and maintaining Timeline Eons takes a lot of effort. If you value this app and you want it to continue to be improved, please share it with friends, rate both Timeline Eons and Timeline Eons FREE favorably in the App Store, and "Like" both apps on the same rating screen in the App store.

To rate and "Like" the app, find the app in the App Store, select Rating and Reviews, and simply tap the rating stars and the "Like" button.


  1. Launch the app.

  2. Select the Settings tab.

  3. Scroll to the bottom of the page.

The version number is at bottom of the Settings page.



Managing Events:

No, updates improve the app without changing the timeline's events. They:

  • Fix known app issues.

  • Improve existing app features.

  • Add new desirable app features.


Downloading the latest app update is always highly recommended.


To ensure that your timeline displays all the factory and RSS events:

  1. Launch the App Store and select the Updates tab. If a newer Timeline Eons version is available, then update your copy.

  2. Launch Timeline Eons, select the Settings tab, and tap the Restore Factory Events.

  3. Turn the Get New Events (RSS) on and then wait for new RSS events to download. Examine new RSS events on the Recent RSS Events page under the Settings tab.


Your events are stored on the device that runs the Timeline Eons app.


To back up your events to Apple's iCloud servers:

  • Launch the Settings app.
  • Select iCloud.
  • Tap the Storage & Backup button.
  • Tap the Manage Storage.
  • Tap the button with your device's name.
  • Turn on the switch next to Timeline Eons.


For additional backup, you may transfer your events to your desktop computer:

  • Use the Export button under the Settings tab to export your events.
  • Use this webpage to save the exported events onto your computer.


If you have multiple devices that run Timeline Eons, use the Export button under the Settings tab to export your events from one device, then use the Import button to import the events into another device. (Importing events adds new events to existing events. It does not replace existing events.)


No, changes to your timeline are saved immediately after they are made. If the device crashes before saving, you only lose the very last change, not your entire data. In this case, simply relaunch the app and repeat only your last action.

Also, saving is done first to an auxiliary file. If a saving problem occurs, this file gets discarded and your previously saved data remains intact. So, unless the device gets physically damaged, losing your data is highly unlikely.

To be 100% safe, back up your device regularly. See this question for backup details.


No, the export function uses the server only as an intermediate and temporary step to transfer data between devices. The server's data gets automatically deleted after a month.

Use the export function only to transfer data between devices. Your export must be followed by another action that imports the events into another device.


To back up your events see this question.


Most events reported missing turned out not to be missing at all. To find an event:

  • If there are hidden categories, turn them back on.

  • Under the Search tab, go to the search page and type one or more keywords. For example, to search for the Wright brothers, type "Wright," "brother," or "wright brothers". The result titles might not include the search keywords (the Wright brothers are found under "First Airplane Flight," not under "Wright Brothers").

  • Under the Search tab, go to an index page and look up an event title. For example, the Wright brothers are found under "First Airplane Flight," not under "Wright Brothers". So, it is necessary to know the title before looking it up in the index.

  • The best way to find an event is by navigating to the approximate timeline date and then activating the Play mode to watch all the events around that time. For example, to find the Wright brothers' first flight that took place at the beginning of the 20th century, jump to the year 1900 and then activate the Play mode. For navigation instructions, see Info at the top-right corner of main app screen.


If some events still cannot be found, please contact us to add them.


When entering the event's date, set the year to 0 (zero) and the era to either AP (after present) or BP (before present).


When entering a date, there is a switch next to the day and month wheel. Turn this switch off to remove the day and month from the event.

There is a similar switch next to the time wheel that can also be turned off to remove the time from the event.


To create events in different languages inside the app:

  • Launch the Settings app.
  • Select General > Keyboard > Keyboards.
  • Add keyboards for your languages.
  • Go back to the Timeline Eons app. While typing text, tap the keyboard's globe key to switch to a different language.


To create or view events via the web tools, set the browser's default encoding to Unicode UTF-8. If you use a text editor, set the editor's default encoding to Unicode UTF-8.


To move custom events from one timeline to another, use the Export button under the Settings tab to export events from the first timeline, then switch timelines and use the Import button to import the same events into the second timeline. The export function works only with custom events. Factory events cannot be exported from the Main timeline.

In general, use multiple timelines only for events that never need to be combined.

To create events that occasionally need to be combined, use a single timeline with multiple categories instead. For example, to add a project to a timeline, add a category with the project's name and then populate this category with the project's events. Toggle this category to display or hide the project.

Tap the app's information button (i) for details.


Period events are used just to delimit a span of time. To display additional information related to a period, add any number of date events that display the necessary information.

For example, the Triassic Period is represented by:

  • One period event titled Triassic Period that delimits the period range.

  • A date event titled Start of the Triassic Period that briefly introduces the period.

  • A date event titled Triassic-Jurassic Extinction that closes the period.

  • Several date events in between that display additional details.


Combined, period and date events can display all the necessary information.


Really Simple Syndication (RSS) is a simple way to receive new timeline events from the app's developer. Simply turn on RSS under the Settings tab to automatically receive new timeline events when they become available. RSS is also used to edit and keep exiting factory events current.

To examine new RSS events, select the Search tab and then tap the right or left navigation arrows to go to the Recent RSS Events page.


Press and hold the device's home button, then press the start button. This takes a snapshot of the screen. View and email the snapshot from the Photos app.

To share your events with friends that have the Timeline Eons app, use the export function under the Settings tab.


Fist method:

  • Select the Settings tab.
  • Tap the Restore Factory Events button.
  • Tap the Delete My Events button.


Second method:

  • Before adding custom events, create custom categories (see the app's info).
  • As you create custom events, set Category to one of your custom categories.
  • To delete all your events, go to the Category List and delete the categories they belong to.


In version 1.2.14 or later, search results display hidden events in lighter text. Hide all the categories except for the one you want to search to identify the search results that belong to the visible category.

In version 1.2.15 or later, search results can be narrowed down by adding the category title to the search words. For example, searching for "France" returns all the events with the word France. Searching for "France science" narrows the search down to the Science & Technology category.




On rare occasions, the app's installation or update produces problems unrelated to the Timeline Eons app itself. If you have not yet created custom timeline events, then simply delete the app and reinstall it. Otherwise, please contact us.


This has been fixed. Upgrade to the latest version of the app and try again. If you still have this problem, it might be caused by the imported image. Try a different image or contact us.


Known issues get addressed and fixed quickly. However, some issues are unique to the device running the app, and you might be the only user experiencing a particular problem. Please contact us and provide us with the necessary details to reproduce and fix the bug.


Less than 8 hints appear at the first launch to introduce some essential features. To get rid of each hint, simply execute the suggested action once. Note that most hints require a single tap, but some require multiple taps or touch & hold.

It is important to explore all the navigation features to use the app effectively. Because the interface is mostly transparent (without visible buttons), it is necessary to follow the hints and read the tutorial.

To go through all the hints quickly, execute each hint and wait for the app to display the next one before you start navigating on your own.

The hints completely disappear after exploring the app's interface.





For technical support, please contact us via the contact page. This form is manily for leaving comments for other website visitors.

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