App Inventor

What App Inventor is

App Inventor is a free, open-source mobile app development platform with a graphical interface, maintained by the App Inventor Foundation, a 501(c)(3) nonprofit in the United States. Its home page says it was founded in 2007 by educators and researchers at MIT and Google, with the vision of enabling anyone, "including those who may not think of themselves as coders", to create mobile apps for real change in their communities. The organization's own claim is that App Inventor is "the largest app development tool for global education". It is aimed first at students, teachers and first-time builders, and the site says its design suits "first-time programmers and veteran developers alike".

The domain appinventor.org belongs to a nonprofit set up by the same team to expand the educational work of the MIT App Inventor project, with extra resources for teachers and students. The About page says the foundation fulfills its mission of helping people become problem-solvers in their lives and communities by building and maintaining the free and open-source App Inventor platform, alongside education programs and thought leadership.

What you build and how

The home page gives the platform's design goal in one sentence: it "was intentionally designed to be free, open source, and easy-to-learn with an intuitive graphical interface". It then makes the device claim that matters to a builder: "Unlike other low-code app development platforms, App Inventor supports a range of devices, from the newest iPhone to Android 2.3, a decade-old operating system that is still used by the most under-resourced and vulnerable populations around the world." That is the clearest statement of what you can reach with an app built here, from current iPhones back to very old Android phones.

The foundation's pages describe the tool through what people build with it rather than through a component list. The Responsible AI in Every Classroom curriculum is the fullest example. It combines AI, data science and coding with MIT App Inventor, and the coding strand says students "learn to create with AI": they use generative AI, machine learning and image classification to build an app that solves a problem in their daily lives. The units show the range of apps involved. In the Music unit, students build an App Inventor app that collects music preference data, then clean and analyze it to make recommendations. In the Stories unit, they program an app that uses a large language model to generate stories, after studying how LLMs work and practicing prompt engineering. In the Water unit, they pair App Inventor with a Micro:bit and a sensor to collect water quality data, analyze and visualize it, and use AI to interpret the findings. A Grades unit uses data to predict exam results and look at the limits of a data set.

The curriculum has a clear structure. Every unit runs through 4 cycles: Investigate & Question, Debate & Discuss, Analyze & Evaluate, and Design & Create. All units align with the UNESCO AI Competency Framework for Students, which the page says was co-authored by Dr. Natalie Lao of the App Inventor Foundation and is organized into 4 aspects: human-centered mindset, ethics of AI, AI techniques and applications, and AI system design. It also integrates the UNESCO Recommendation on the Ethics of Artificial Intelligence. Educators are encouraged to begin with Introducing AI, an unplugged activity on the UN's AI ethics principles, and the 4 main units can then be taught in any order. Ethics runs through all of them: when students use generative AI they reflect on privacy, and when they study data they examine bias.

The history page explains where much of the learning material came from. The original appinventor.org was an educational site on programming apps with MIT's App Inventor, offering free access to the App Inventor book by University of San Francisco professor David Wolber, App Inventor creator and MIT professor Hal Abelson, and Liz Looney and Ellen Spertus, two of the App Inventor developers from Google. Wolber developed many tutorials for Google's original App Inventor site, helped build the App Inventor version of an AP Computer Science course at mobilecsp.org, and with his USF students led development of the App Inventor Community Gallery. His work was funded by the W.M. Keck Foundation and a multi-university NSF grant. The original site's Course-in-a-Box helped middle school, high school and college teachers get a new course running within days, and the page says that as of June 2026 the original appinventor.org has been folded into the App Inventor Foundation's site, where the book and video lessons remain available.

Beyond the tool, the foundation runs programs that give builders a reason to ship. The Global Appathon, formerly the Global AI Hackathon, is described as "a free, virtual hackathon" hosted by the App Inventor Foundation and MIT App Inventor, where entrants build mobile apps for a cause and are judged on creativity, social impact, design thinking and technical skill. Regional Appathons run with partners in multiple languages and end in a regional showcase: the Japan Wagamama Awards, hosted by IRODORI, Inc., and the Taiwan Regional Appathon with the Taiwan Ministry of Education and NTNU, whose 2024 edition was the first event of the regional program. The archive runs back through Summer Appathons from 2020 to 2023, App of the Month and a Coronavirus App Challenge. Other programs are Teacher Excellence Awards, a Youth Incubator Program and the MIT App Inventor Global Education Summit.

Cost, reach and support

There are no plans or prices: the platform is described as free and open source, and the foundation is funded through donations that the site says are tax-deductible. The only license the pages name is CC BY-SA, which covers the curriculum: all curriculum materials are "free and open-source under CC BY-SA".

On reach, the home page quotes Mobile CSP, a College Board-approved AP Computer Science Principles curriculum that it says reaches 700+ teachers and 30K+ students: "After learning App Inventor, 85% of students agreed that computer science can positively impact their community." It also quotes Gitanjali Rao, TIME 2020 Kid of the Year, and Isabela Sanchez Taipe, a regional leader of the UN's Girl Up initiative, who says her "mindset changed from user to developer". The About page links annual reports for 2025, 2024 and 2023 with platform statistics, stories from the field, an overview of the education programs and a letter from the CEO.

Support is community-based. The curriculum page says the team is small and does "not have the bandwidth to offer individualized support", and points questions to the MIT App Inventor Community Forum, where App Inventor experts volunteer their time. Teachers can join the Educator Collaborative mailing list, and the site lists educator workshops including a TX Preferred Provider Educator Workshop and WeTeach_CS Deep Dives. Schools and programs can sponsor teacher trainings through the contact form.

Who it suits and where it is narrow

App Inventor suits a teacher building a computing or AI unit, a student making a first app, a community group or nonprofit that wants to learn by building, and a first-time builder who wants a free, open-source tool with a long educational record. It suits a school that must avoid license fees, since both the platform and the curriculum are free, and a classroom with older Android devices, given the support back to Android 2.3.

The caveat is focus. Everything on these pages is built around learning, competitions and social impact; the site does not present the tool for commercial products, store publishing workflows or team development, so a startup planning a polished commercial release is outside the audience the foundation writes for. Help comes from volunteers in the forum rather than from a support desk.