Corrections to wording, facts and math across the missions, and adventures set in the United States now use US units. Wrong answers in the reading questions are now as long and believable as the right ones, so every question takes a real read. In Shipwreck Dive, Sitka is now a river otter. The Teachers page now says the reading passages run about 180 to 330 words.

Small fixes. A camp code now keeps the streak (days in a row) when it is pasted on another device, and the Moving to another device code now says so when the streak was the only thing it brought across. If a code is pasted in the first moments after the app opens, before the App Store has confirmed the purchase, the app now says "One moment" and waits instead of saying the year is not unlocked. The Teachers page now gives the length of the reading passages: about 180 to 385 words.

Easier reading in the later adventures. From Volcano Watch (the tenth adventure) on, the passages use shorter sentences, closer to the first nine adventures. New math for grades 4 to 8: adding and subtracting fractions with different denominators (like 1/2 + 1/3), decimals and box volume for grades 4 and 5; dividing fractions for grade 6; multiplying and dividing negative numbers for grade 7; larger right triangles and cylinder volume for grade 8. On phones, on iPad held upright, and on iPhone Duo's inner screen turned sideways, when the keyboard comes up the page now scrolls just enough to keep the answer box and its Check button in view.

Accessibility update. Animations settle on their own within a few seconds. Clearer outlines on buttons and boxes in the teacher pages, headings on question screens for screen readers, and a link to the class page from the parent report. Also corrects answers, facts and wording across the missions.

The Parent tab now asks a grown-up question before the first parent code is set, like the rest of the app. The answer box hint is shorter: "Your answer". Layout fixes for iPhone Duo at larger text sizes and with the keyboard open.

Forgot the parent code? Setting a new one now asks a harder grown-up question. Every player's progress stays put. At larger text sizes, the "1 of 5" label in a mission no longer breaks in two. Gentler wording in a few reading passages.

In Practice, every answer now gets a clear green check or red X right beside the problem.

Each adventure's final choice now shows its own picture and is remembered on the medal wall. Clearer messages for screen readers, and better layouts on phones held sideways and at larger text sizes on iPad.

A fact-check of all 36 adventures: dozens of real-world details corrected in the reading passages, fact cards and guide lines, math problems that now agree with their own stories, and clearer hints and answer choices in the reading questions.

The short briefing before each reading, math and directions task now teaches with its own examples instead of working one of that day's problems, and a few directions tasks were made clearer.

Answers written like "x = 4" now count in the grade 7 and 8 math. Hundreds of grade 7 and 8 questions were reworded to read clearly, and a few reading passages had their facts corrected.

When an adventure ends with a choice, that choice now stays on screen until it's made: the medal celebration no longer covers it. The tab bar fits on one row on every iPhone, a mission played again is kept when a grown-up clears marked missions, keyboard and VoiceOver use is smoother, and hundreds of math questions and a few reading passages were reworded to read more clearly.

Progress is safer: the app now keeps its own backup of every player's progress, and picks up right where a child left off if iOS closes it in the background. Math answers typed with their unit, like "360 meters" or "1 3/4", now count. Clearer layouts at the largest text sizes, a more accurate parent report, and corrections to a few dozen questions and hints.

Dozens of hints and a few questions in the reading and math were corrected so they match their passages exactly, and the family handout now follows the text size set in Settings too.

The parent and teacher pages now follow the text size set in Settings too.

The game's text now follows the text size set in Settings on iPhone and iPad, including the larger accessibility sizes. At the standard size, nothing looks different. Starting a player over now asks the same grown-up question as a purchase, and the app no longer gets stuck waiting when the App Store is slow to answer.

Every reading passage now uses shorter sentences, with the same facts, words and questions. A few facts and hints were corrected along the way. Questions, steps and hints can be read aloud with Speak Selection, and the tab bar and small buttons are easier to tap. On iPhone Duo, Odyssey now uses the whole cover screen.

Practicing an earlier mission no longer sets aside a mission that is paused partway. When an adventure is played again from the start, the trail shows clearly where the child is up to. Removing a player after starting them over keeps the earlier backup. The trail now sits on the mountain when the device is turned sideways.

A paused mission now waits until it is finished, even overnight or after trying another adventure. Playing a finished adventure again keeps its first scores in the parent report. With more than one player on a device, adding a code from another device now asks which player it is for.

The pictures on the adventure chooser are lighter, so the app is a little smaller again. Nothing about the game has changed.

Nothing about the game has changed. A grown-up who opens the field report after a finished adventure is now asked, once, whether they would rate Odyssey. Your child is never asked.

The app is less than half the size it was. Nothing about the game has changed.

Held sideways, a long message from your guide could push the row of buttons at the bottom off the screen with no way to scroll to them. It stays put now, however much your guide has to say.

Two messages inside the app were written for the web version and did not make sense on a phone or tablet. They now say the right thing.

If anything stops Odyssey saving your child's progress — a device setting, or storage turned off — it now says so straight away, instead of letting a day's work disappear quietly. Nothing else has changed in this version.