- Two new Custom Theories: 'Magnetic Fields' and 'Basel Problem'.
- Updated the Riemann Zeta Function custom theory.
- Added a max currency label in the publication popup of Custom Theories.
- Added the τ value of the active Custom Theory on the offline calculation screen.
- Fixed: Some forms of the custom theory URL were not considered as being in the official repository.
- Fixed: Variable 'b' of the Riemann Zeta CT could not be fully bought by the auto buyer.
- Fixed: API - The 'Keyboard.NUMERIC' property was not behaving as expected for non-English OS languages.
- Fixed: API - Crash when providing invalid quaternary entries.

- Two new Custom Theories: 'Magnetic Fields' and 'Basel Problem'.
- Updated the Riemann Zeta Function custom theory.
- Added a max currency label in the publication popup of Custom Theories.
- Added the τ value of the active Custom Theory on the offline calculation screen.

Fixed: Leaderboard metadata was incomplete.
Updated localization.

Fixed: Issue with how rewards were counted.
Fixed: The app name contained a wide space on the home screen.

Fixed: The game thread could stop working when coming back to game in some occasions.

New Custom Theory: Riemann Zeta Function.
Fixed: The offline calculation screen could appear for times less than 2 minutes.
Fixed: Stars would stop accumulating when an infinity was reached.
Fixed: The language selection screen could have a white background on first launch.

Fixed: The leaderboard f(t) value wasn't based on 'Lifetime f(t)'.
Fixed: Some Custom Theories could sometime timeout prematurely. Increased the timeout to 15 seconds.
Fixed: Some typos in translations.

Custom Theory SDK:
- Fixed: Properties of stateful UI components did not always reflect the displayed value.
- Fixed: It was possible to make recursive calls to a theory function and crash the game.

- Two new Custom Theories: Fractional Integration and Fractal Patterns
- The tau contribution from official Custom Theories have quadrupled.
- The tau limit has also been increased.
- Fixed: The theory automator freeze.
- Fixed: Official Custom Theory indices.
- Fixed: Formatting in the save slot window.
- Various additions to the Custom Theory SDK.

Fixed: Custom Theories would sometimes generate an error when the game is closing.
Fixed: Numerical values in the summary bar would sometimes wrap to the next line.
Added two more save slots.

- New language: Lithuanian!
- Fixed: Music could not be turned off on some devices.
- Fixed: The game was not always saved when closing the app.
- Custom Theories:
  - Fixed: The theory list did not assign the correct symbol and other theories were not really sorted by name.
- Custom Theory API:
  - Fixed: Sliders did not correctly handle 'minimum' and 'maximum' in the constructor.
  - Fixed: CustomCost with 'max' buy amount did not work.
  - Fixed: Milestones did not update when 'maxLevel' is modified.
  - Added a grace period of 1 to 2 seconds (randomized) to the acceleration button.
  - Slowed down the deceleration of the acceleration (I know... it sounds strange).
  - Added a decimal to the mantissa of b, db, and μ when the exponent is over 10,000.
  - Fixed some UI glitches.
  - Fixed some exploits.
  - Fixed a bad behavior with bulk purchases and auto-buyers, e.g., buy amount is x10 and max level is 8.

- Improved list of Custom Theories
- Added 'Slider' to API
- Added star rewards to API
- Fixed various issues in SDK
- Minor UI fixes

- New language: Serbian (Cyrillic)!
- Two new Custom Theories.
- Increase tau limit of Custom Theories to 1e150.
- Custom Theory API: Added custom variables to the MathExpression.
- Custom Theory API: Added 'get3DGraphTranslation'.
- Custom Theory API: The tertiary equation bounding box now adapts to its content.
- Various bug fixes

Fixed: Custom Theories - Crash when there are no regular upgrades.
Fixed: Save slots could be overwritten on rare occasions when switching slot.

- New language: Czech!
- Theory SDK: Added a way to provide a cumulative and max function to custom cost models.
- Theory SDK: Added a way to display milestones and publication goals in terms of the currency.
- Fixed: Having an auto-buyer without the 'Buy All' button didn't allow to display the upgrade toggles.
- Fixed: The active Custom Theory could get deselected.
- Fixed: Time and date format in the language popup.

- Added onPressed and onReleased to the Button API.
 - The URL of a Custom Theory can now be copied to clipboard.
 - Official custom theories are now hard capped to 1e100τ.
 - Fixed: Progress of achievements in the category 'Custom Theory' was not implemented.
 - Fixed: During the 1.4.21 update, T9 could display the wrong upgrades until restarting the game.
 - Fixed: The value of tau could be miscalculated in custom theories.

- Fixed: Offline calculation screen was always displayed.
 - Fixed: Math Expressions did not consider tau from theories.
 - Fixed: Rewarded Ads had a strange behavior (players were not penalized).
 - Fixed: Game could still run in background
 - Minor changes to the API.

Semi-major update: Make you own theories or play theories made by other players. Custom theories become available after completing the story.

- 3 new languages: Latvian, Portuguese (Portugal), and Slovak!
 - New 'Light' theme.
 - Fixed: Two variables did not have proper subscripts in Lemma 7.
 - Fixed: Some upgrades with equal cost could display different number of decimals.
 - Fixed: Popups could sometimes be shown over the offline progress screen.
 - Fixed: The tickspeed of theory 1 was not properly updated after publishing.

- Fixed: The last milestone in Theory 4 wasn't doing anything (it does now).
 - Fixed: Theories 2, 4, and 6 could get abnormally high values of 'q' and 'r' after offline progress.
 - Fixed: Inconsistent rounding in the offline progress screen.
 - Fixed: Secret Achievement 8 was more permissive than it should.
 - Fixed: It was possible to buy a milestone that was dependant on another refunded one.

- Added parsing of numbers the form 1.0e-5.
 - Fixed: Tau was not following the same rounding rule as currencies.
 - Fixed: Minigame popups could be popped twice.
 - Fixed: Theory 8 started before the first purchase.
 - Fixed: An equation was not updated correctly in Theory 9.
 - Fixed: Achievements for spent stars did not consider minigame purchases.

- 2 new languages: Norwegian and Ukrainian!
 - Fixed: The app would silently crash when exiting the game using the back button.
 - Fixed: The cost of Prestige and Supremacy upgrades didn't follow the same formatting rule as their currencies.
 - Fixed: Currencies will now be rounded down and costs will be rounded up when displayed.
 - Fixed: Music continued to play in background on some devices.
 - Fixed: Some expressions generated cryptic exceptions.

- 3 new languages: Arabic, Farsi, and Hebrew!
 - Added the eye icon to the publication window.
 - Reduced the overlap of variables labels that could happen in some specific occasions.
 - Fixed: Parts of Theory 9 could start too early.
 - Fixed: Setting music to 'off' could still generate static noise when connected to a Bluetooth device.

- 1 new language: Indonesian!
 - The values of 'b' and 'mu' are now displayed only with scientific notation.
 - Fixed: The UI was too big on small screens.
 - Fixed: Colors on MiUi OS (take 2).
 - Fixed: Cost comparison was wrong with permanent levels in some occasions.
 - Updated translations: French, Japanese, Korean, Vietnamese.

- Increased the contrast of both themes.
 - 1 new language: Korean!
 - Fixed: Missing characters in the Chinese Traditional font.

- The game will now save after a graduation or a publication.
 - 1 new language: Japanese!
 - Changed the Chinese fonts to sans serif to improve readability.
 - Fixed: Slight misalignment in the summary bar.
 - Fixed: Equation of Theory 3 had an offset depending on the device's DPI.