现在可以直接在本应用中解锁 PocketCAS Pro。本次更新还会说明没有值的结果为何没有值，让大数字更易读，并修复了一些小问题。 2026.2.1 版本的新功能： - 启动画面再次显示 PocketCAS 的 π。在 2026.2 版本中它是空白的。 - 主菜单（Main Menu）中用于购买的那一行现在名为 Upgrade to PocketCAS Pro。 - 当数值搜索没有找到解时，下方的灰色行现在会说明这种搜索可能漏掉解。 2026.2 版本的新功能： - 在应用内一次性购买即可解锁 PocketCAS Pro，无需订阅。它增加计算步骤、积分、方程求解、数百个其他函数，以及更大的图像和矩阵。支持家人共享，Restore Purchases（恢复购买）位于主菜单（Main Menu）中。 - 结果下方现在会显示所有建议。其中一些属于 PocketCAS Pro，轻点即可了解如何解锁。输入 Pro 的函数时也是如此。 - 当结果没有值时，PocketCAS 现在会说明原因，例如 Undefined 或 Not invertible，下方通常附有简短说明。输入中的拼写错误会被标出，建议会提供修正：sin x 改为 sin(x)。停止的计算会显示运行了多久，并提供 Calculate Again。 - 在精确结果旁边，≈ 行现在也会显示带单位的结果的小数值。非常大和非常小的数字显示为 2.43 × 10¹⁸，而不是 2.43E+18；当舍入改变了小数结果时，建议 Exactly 会显示精确值。 - 结果和输入中的大数字现在每三位一组显示，例如 1 234 567。在设置的 Digit Grouping 选项中可以选择其他分隔符，或不使用分隔符。编辑器和复制的文本仍不带分隔符，屏幕放不下的长数字会在下一行继续显示。 - 在 iOS 26 上，What's New 和欢迎页面的标题不再在顶部被截断。 - iPhone 横屏时，Tools 菜单无需滚动即可显示所有工具。 - Plot Settings 中每种颜色旁都有色块，不在列表中的颜色会显示为 Custom Color。 - VoiceOver 现在会将 ( 和 ) 读作圆括号而不是花括号，在 Select 模式下选择条目也能正常使用。 - 旧版本的 PocketCAS 仍能打开你的文档，新的说明会以纯文本显示在结果旁边。 2026.1 版本的更改： - 在函数结果下方，建议会显示它的导数和答案，旁边还有一个小图像。轻点即可将其加入你的文档。 - 结果看起来就像数学课本，较长的结果会按屏幕宽度换行。 - 二维图像更清晰，网格更精细；三维曲面带柔和的光照与阴影。文档中的图像可以直接在原处平移、旋转和缩放。 - 全新的键盘外观，最近用过的函数就在键盘正上方。 - 为新用户准备了简短的欢迎介绍；函数参考现在列出所有函数，PocketCAS Pro 增加的函数带有 PRO 标记。 - 在 iOS 26 及更高版本上，PocketCAS 采用 Apple 的新设计“液态玻璃”，并换上了新图标。 - 括号会自动闭合。 如果有些功能和你习惯的不一样，或者你发现了问题，请写信告诉我们。

现在可以直接在本应用中解锁 PocketCAS Pro。本次更新还会说明没有值的结果为何没有值，让大数字更易读，并修复了一些小问题。 2026.2 版本的新功能： - 在应用内一次性购买即可解锁 PocketCAS Pro，无需订阅。它增加计算步骤、积分、方程求解、数百个其他函数，以及更大的图像和矩阵。支持家人共享，Restore Purchases（恢复购买）位于主菜单（Main Menu）中。 - 结果下方现在会显示所有建议。其中一些属于 PocketCAS Pro，轻点即可了解如何解锁。输入 Pro 的函数时也是如此。 - 当结果没有值时，PocketCAS 现在会说明原因，例如 Undefined 或 Not invertible，下方通常附有简短说明。输入中的拼写错误会被标出，建议会提供修正：sin x 改为 sin(x)。停止的计算会显示运行了多久，并提供 Calculate Again。 - 在精确结果旁边，≈ 行现在也会显示带单位的结果的小数值。非常大和非常小的数字显示为 2.43 × 10¹⁸，而不是 2.43E+18；当舍入改变了小数结果时，建议 Exactly 会显示精确值。 - 结果和输入中的大数字现在每三位一组显示，例如 1 234 567。在设置的 Digit Grouping 选项中可以选择其他分隔符，或不使用分隔符。编辑器和复制的文本仍不带分隔符，屏幕放不下的长数字会在下一行继续显示。 - 在 iOS 26 上，What's New 和欢迎页面的标题不再在顶部被截断。 - iPhone 横屏时，Tools 菜单无需滚动即可显示所有工具。 - Plot Settings 中每种颜色旁都有色块，不在列表中的颜色会显示为 Custom Color。 - VoiceOver 现在会将 ( 和 ) 读作圆括号而不是花括号，在 Select 模式下选择条目也能正常使用。 - 旧版本的 PocketCAS 仍能打开你的文档，新的说明会以纯文本显示在结果旁边。 2026.1 版本的更改： - 在函数结果下方，建议会显示它的导数和答案，旁边还有一个小图像。轻点即可将其加入你的文档。 - 结果看起来就像数学课本，较长的结果会按屏幕宽度换行。 - 二维图像更清晰，网格更精细；三维曲面带柔和的光照与阴影。文档中的图像可以直接在原处平移、旋转和缩放。 - 全新的键盘外观，最近用过的函数就在键盘正上方。 - 为新用户准备了简短的欢迎介绍；函数参考现在列出所有函数，PocketCAS Pro 增加的函数带有 PRO 标记。 - 在 iOS 26 及更高版本上，PocketCAS 采用 Apple 的新设计“液态玻璃”，并换上了新图标。 - 括号会自动闭合。 如果有些功能和你习惯的不一样，或者你发现了问题，请写信告诉我们。

这是 PocketCAS 多年来最大的一次更新，带来全新的设计，以及理解结果的新方式。 - 在函数结果下方，建议会显示它的导数和答案，旁边还有一个小图像。轻点即可将其加入你的文档。 - 结果看起来就像数学课本，较长的结果会按屏幕宽度换行。 - 二维图像更清晰，网格更精细；三维曲面带柔和的光照与阴影。文档中的图像可以直接在原处平移、旋转和缩放。 - 全新的键盘外观，最近用过的函数就在键盘正上方。 - 为新用户准备了简短的欢迎介绍；函数参考现在列出所有函数，PocketCAS Pro 增加的函数带有 PRO 标记。 - 在 iOS 26 及更高版本上，PocketCAS 采用 Apple 的新设计“液态玻璃”，并换上了新图标。 - 括号会自动闭合。 如果有些功能和你习惯的不一样，或者你发现了问题，请写信告诉我们。

- Updated our 3D graphing from OpenGL to Metal. This should lead to better performance and nicer-looking graphs overall. - While at it, also increased the default precision of 3D graphs from 30 points per axis to 60. - Updated the CAS kernel to the latest version.

- Updated the CAS kernel to the latest version. - This version should finally resolve all remaining crashes on older operating system versions.

- Updated the CAS kernel to the latest version. - Version 2023.1.3 should hopefully fix a crash at launch on iOS 12. - Version 2023.1.4 should hopefully fix another crash when loading documents.

- Updated the CAS kernel to the latest version. - This version should hopefully also fix a crash at launch on iOS 12.

Updated the CAS kernel to the latest version. Reverted the crash fix from version 2023.1.1, as it caused a lot of other problems. Sorry about that!

- Updated the CAS kernel to the latest version. - Version 2023.1.1: Fixed a crash at launch on older operating system versions.

Update to the latest version of the CAS kernel.

- Updated the CAS kernel to the latest version. - Added support for 120 Hz animations on ProMotion-enabled iPhones. - Fixed a few crashes.

- Improved support for e.g. the factorization of very large integers. - Updated the CAS kernel to the latest version.

- Full support for the new operating system versions. - Updated the CAS kernel to the latest version. - Fixed a few minor issues. - Improved mouse pointer support. - Fixed an issue with the matrix editor losing focus.

- Fixed an issue with loading documents stored in iCloud Drive, but not inside the "PocketCAS" folder in iCloud Drive. - Various stability fixes, especially with regards to the toolbar as well as plotting.

Various stability fixes, especially with regards to the toolbar as well as plotting.

Bugfix: Fixed an issue with printing/exporting documents that contain 2D graphs. Bugfix: Fixed an issue with exporting full-screen 3D graphs. Bugfix: Fixed an issue with misaligned value tables. Bugfix: Added a workaround that might fix issues with saving documents to iCloud.

New Feature: Added support for dark mode on upcoming versions of iOS. New Feature (BETA): Added extremely rudimentary support for showing calculation steps for a few functions. Enable "Calculation Steps" in the document settings, then e.g. calculate "diff(sin(x)^3)" to see an example. Note that calculation steps will need to be enabled independently for each document, and the usefulness of the steps can vary greatly. We can not guarantee that the quality of these steps will ever increase, so this feature might remain "Beta" forever. New Feature: You can now set a custom legend label for a graph, e.g. "Parabola" instead of "x^2". Improvement: Increased the size of the matrix editor on iPad. Improvement: Updated to the latest version of the CAS kernel. Improvement: Internal rearchitecting and modernizing of the app. Note: PocketCAS now requires iOS 11 or newer.

New Feature: Added support for new iPad screen resolutions. Improvement: Reverted the "blue" graph color on Mac back to its previous value. Changes in PocketCAS 3.11: New Feature (Mac): Added support for Dark Mode on macOS Mojave! New Feature: You can now use the function domain() to find out the definition domain of a function. Example: domain(log(x-0.5)+asin(x)) Improvement: Improved support for iOS 12. Improvement: Added support for surfacing PocketCAS documents as Siri suggestions. Improvement: Added support for new iPhone screen sizes (e.g. for iPhone XS Max). Improvement: Updated to the latest computation kernel (which includes the domain() function mentioned above). Improvement: PocketCAS can now automatically detect issues with iCloud document storage and suggests disabling it. Improvement: Added an _underscore_ option to the keyboard on iOS (press and hold the '.' key to access it). Improvement (Mac): Disabled smart quotes in the entry editor. Improvement (Mac): Improved the visuals of 3D line drawing. Bugfix: Fixed a few minor calculation errors and crashes. Bugfix (Mac): Better display when scrollbars set to always show.

New Feature (Mac): Added support for Dark Mode on macOS Mojave! New Feature: You can now use the function domain() to find out the definition domain of a function. Example: domain(log(x-0.5)+asin(x)) Improvement: Improved support for iOS 12. Improvement: Added support for surfacing PocketCAS documents as Siri suggestions. Improvement: Added support for new iPhone screen sizes (e.g. for iPhone XS Max). Improvement: Updated to the latest computation kernel (which includes the domain() function mentioned above). Improvement: PocketCAS can now automatically detect issues with iCloud document storage and suggests disabling it. Improvement: Added an _underscore_ option to the keyboard on iOS (press and hold the '.' key to access it). Improvement (Mac): Disabled smart quotes in the entry editor. Improvement (Mac): Improved the visuals of 3D line drawing. Bugfix: Fixed a few minor calculation errors and crashes. Bugfix (Mac): Better display when scrollbars set to always show. Bugfix: Fixed a crash in PocketCAS 3.11 under with old operation system versions.

New Feature (Mac): Added support for Dark Mode on macOS Mojave! New Feature: You can now use the function domain() to find out the definition domain of a function. Example: domain(log(x-0.5)+asin(x)) Improvement: Improved support for iOS 12. Improvement: Added support for surfacing PocketCAS documents as Siri suggestions. Improvement: Added support for new iPhone screen sizes (e.g. for iPhone XS Max). Improvement: Updated to the latest computation kernel (which includes the domain() function mentioned above). Improvement: PocketCAS can now automatically detect issues with iCloud document storage and suggests disabling it. Improvement: Added an _underscore_ option to the keyboard on iOS (press and hold the '.' key to access it). Improvement (Mac): Disabled smart quotes in the entry editor. Improvement (Mac): Improved the visuals of 3D line drawing. Bugfix: Fixed a few minor calculation errors and crashes. Bugfix (Mac): Better display when scrollbars set to always show.

Bugfix: Fixed crashes when entering functions under iOS 11.2 beta. Bugfix: Fixed a few calculation errors. Improvement: Made 3D line graphs a bit thicker, for better visibility. Improvement (Mac): Made the width of the "expanded" graph popover depend on the current window's width. For the improvements in PocketCAS 3.10, please see https://pocketcas.com/changes.php. In case you left a review before, please consider updating (or reposting) it according to how the new version works for you. App Store reviews are very important to us.

The bad news: The previous version of PocketCAS had a few crashing bugs. The good news: Our new crash-reporting system helped us find them more easily. The better news: This update fixes them! New Feature (iOS 11): Drag-and-drop support! You can now: - Use drag-and-drop on the sides of entries to re-order them. - Drop text onto PocketCAS' entry list to create a new entry with that text. - Drag-and-drop a formula inside PocketCAS to create a new entry with the formula's text. - Drop an image onto a 'Calculation' entry to attach it to the calculation as an image annotation. - Drag plots outside PocketCAS to export them in transparent PNG or PDF format. (The exported type can be configured in the application settings, but also depends on the receiving application.) - Drag formulas outside PocketCAS to export them in transparent PNG, PDF, or text format. (The exported type can be configured in the application settings, but also depends on the receiving application.) New Feature (iOS 11): File management! PocketCAS uses iOS 11's new document picker. This lets you create subfolders, save documents anywhere you like, tag them, browse them in the Files app, and more. The file browser will even show thumbnail previews of the first entry for documents that have been edited with PocketCAS 3.10 before. New Feature (iPhone X): PocketCAS will fully support the iPhone X's display from day one. Improvement: PocketCAS should now remember your last-opened document more reliably. Improvement: Increased the default accuracy for 2D graphs. Improvement: Slightly improved the quality of 3D graphs, especially when exporting them on macOS. Improvement: PocketCAS will now display variables in the entry editor in italics as soon as you declare them with ':=', even before you actually execute the calculation that sets them. Improvement (Mac): Added a hotkey to search the function list in the entry editor. Bugfix: Fixed a few bugs in the computation kernel (CAS). Bugfix (Mac): Fixed crashes under OS X Mavericks. You might be wondering why there's no entry "Added support for the 10.5-inch iPad Pro's display" in here. Well, that display was supported by PocketCAS right out of the box! In case you left a review before, please consider updating (or reposting) it according to how the new version works for you. App Store reviews are very important to us.

Remember that issue we mentioned in yesterday's Release notes for PocketCAS 3.10 where tapping a keyboard button would open a new, blank editor? Guess what — we were able to reproduce and finally fix it :-) So here comes PocketCAS 3.10.1 with a fix for that and the following improvements from PocketCAS 3.10: New Feature (iOS 11): Drag-and-drop support! You can now: - Use drag-and-drop on the sides of entries to re-order them. - Drop text onto PocketCAS' entry list to create a new entry with that text. - Drag-and-drop a formula inside PocketCAS to create a new entry with the formula's text. - Drop an image onto a 'Calculation' entry to attach it to the calculation as an image annotation. - Drag plots outside PocketCAS to export them in transparent PNG or PDF format. (The exported type can be configured in the application settings, but also depends on the receiving application.) - Drag formulas outside PocketCAS to export them in transparent PNG, PDF, or text format. (The exported type can be configured in the application settings, but also depends on the receiving application.) New Feature (iOS 11): File management! PocketCAS uses iOS 11's new document picker. This lets you create subfolders, save documents anywhere you like, tag them, browse them in the Files app, and more. The file browser will even show thumbnail previews of the first entry for documents that have been edited with PocketCAS 3.10 before. New Feature (iPhone X): PocketCAS will fully support the iPhone X's display from day one. Improvement: PocketCAS should now remember your last-opened document more reliably. Improvement: Increased the default accuracy for 2D graphs. Improvement: Slightly improved the quality of 3D graphs, especially when exporting them on macOS. Improvement: PocketCAS will now display variables in the entry editor in italics as soon as you declare them with ':=', even before you actually execute the calculation that sets them. Improvement (Mac): Added a hotkey to search the function list in the entry editor. Bugfix: Fixed a few bugs in the computation kernel (CAS). Bugfix (Mac): Fixed crashes under OS X Mavericks. You might be wondering why there's no entry "Added support for the 10.5-inch iPad Pro's display" in here. Well, that display was supported by PocketCAS right out of the box! In case you left a review before, please consider updating (or reposting) it according to how the new version works for you. App Store reviews are very important to us.

PLEASE NOTE: We had occasional reports where tapping buttons on PocketCAS' built-in math keyboards would open a new blank entry editor under iOS 11. For us, these issues disappeared completely once we rebooted our devices. Unfortunately, this also meant that we could no longer reproduce (nor fix) these issues. In case they still occur for you even after a reboot, please let us know so we can investigate them together! New Feature (iOS 11): Drag-and-drop support! You can now: - Use drag-and-drop on the sides of entries to re-order them. - Drop text onto PocketCAS' entry list to create a new entry with that text. - Drag-and-drop a formula inside PocketCAS to create a new entry with the formula's text. - Drop an image onto a 'Calculation' entry to attach it to the calculation as an image annotation. - Drag plots outside PocketCAS to export them in transparent PNG or PDF format. (The exported type can be configured in the application settings, but also depends on the receiving application.) - Drag formulas outside PocketCAS to export them in transparent PNG, PDF, or text format. (The exported type can be configured in the application settings, but also depends on the receiving application.) New Feature (iOS 11): File management! PocketCAS uses iOS 11's new document picker. This lets you create subfolders, save documents anywhere you like, tag them, browse them in the Files app, and more. The file browser will even show thumbnail previews of the first entry for documents that have been edited with PocketCAS 3.10 before. New Feature (iPhone X): PocketCAS will fully support the iPhone X's display from day one. Improvement: PocketCAS should now remember your last-opened document more reliably. Improvement: Increased the default accuracy for 2D graphs. Improvement: Slightly improved the quality of 3D graphs, especially when exporting them on macOS. Improvement: PocketCAS will now display variables in the entry editor in italics as soon as you declare them with ':=', even before you actually execute the calculation that sets them. Improvement (Mac): Added a hotkey to search the function list in the entry editor. Bugfix: Fixed a few bugs in the computation kernel (CAS). Bugfix (Mac): Fixed crashes under OS X Mavericks. You might be wondering why there's no entry "Added support for the 10.5-inch iPad Pro's display" in here. Well, that display was supported by PocketCAS right out of the box! In case you left a review before, please consider updating (or reposting) it according to how the new version works for you. App Store reviews are very important to us.

Version 3.9.1 fixes a rare crash (mostly happening on macOS) when manipulating plots introduced in version 3.9. Version 3.9: This update switches PocketCAS to a different C++ library. This should have very little impact on you, except for improved performance in some cases :-) However, in case you notice anything weird, please let us know via the app's support form. In addition, this version contains: Improvement: Added a "Safe Mode" that doesn't load results and variables in documents, to avoid crashes. On iOS, this mode automatically activates when the app crashes during launch. Bugfix: Fixed a crash on iPhone when trying to open the graph settings for a second time. In case you left a review before, please consider updating (or reposting) it according to how the new version works for you. App Store reviews are very important to us.