# ACNHMobileSpawner: editing Animal Crossing saves from your phone > ACNHMobileSpawner is a Unity multi-tool for Animal Crossing: New Horizons that runs on Windows, Mac, Linux, Android and iOS, and it talks to a hacked Switch console to inject items, edit villagers and change values while the game is running. It is GPL-3.0, works on a console with custom firmware and the sys-botbase or USB-Botbase sysmodule, and the author asks you not to use it to ruin other players' games. **berichan/ACNHMobileSpawner** — Animal Crossing New Horizons real-time multi-tool built in Unity. - Repository: https://github.com/berichan/ACNHMobileSpawner - Stars: 640 · Forks: 53 - Language: C# - License: GPL-3.0 - Published: 2026-10-21 · Updated: 2026-10-21 · Language: en - Canonical page: https://hysenlabs.com/projects/berichan-acnhmobilespawner ## What the app is for, and the unusual constraint behind it ACNHMobileSpawner is described as a multi-tool for Animal Crossing: New Horizons built in Unity, and the README opens with a clarification that for mobile and desktop despite the name. The stated design goal is that you use it while you are playing, so that you do not have to manually edit saves on a PC. The README says it is confirmed working on Windows, Mac, Linux, Android and iOS, and the Japanese text says the same thing about injecting items in real time, editing the island and changing values in game. The constraint that shapes everything is the hardware requirement: a Switch running custom firmware with the sysmodule sys-botbase or USB-Botbase installed. The primary language is C#, the licence is GPL-3.0, the default branch is master, and the recent release tags are 1.04-a, which covers ACNH 3.0.0 related fixes, 1.03-a, which added support for ACNH 3.0.0, and 1.02-a from 2023. The last push was on 2026-04-14. ## What it can do to a running game The in-play action list is the best description of the tool's scope. You can inject and delete inventory items, and it supports all eight player slots. You can change the amount of Nook Miles, and the bells held in your bank and in your wallet. You can change and replace villagers, using a perfect villager database. You can change the turnip buy and sell prices and the fluctuations. You can place and bulk spawn items on your map, with a few presets already in the app, and you can find and replace items. You can spawn internal items, and there is a linked list of all of them. You can remove certain map items such as weeds, trees, flowers and spoiled turnips. You can refresh the items on the floor of your island, and it logs the people who came in while the refresher was running. You can freeze certain values, including villagers, inventory and map contents, and you can create teleports to move between common areas quickly. The README also notes that hex editing raw RAM bytes is possible, and that this works in any Switch game, not just Animal Crossing. ## Getting it running, and the builds situation The README points to the wiki for help and troubleshooting, and to a Discord support server for questions, with the instruction to read the wiki first. For binaries, each major release is built for Windows, Android, macOS and iOS, and the compiled builds are linked from the releases page. There is a candid note about the iOS builds: they are auto-built and untested, but the author has been told they work. That is worth weighing before you rely on the phone build, since the interesting use case of this tool is precisely the one the least tested build targets. The app is also based heavily on NHSE, a separate tool for the same game, and the Notes section is a rare admission about the build process itself: some code was deleted and had to be rebuilt using ILSpy, and the author says the affected classes were cleaned up as best they could, with the ILSpy warnings left in place on purpose so that anyone reading the code can see what was touched. ## The limits the README puts on itself The project is unusually direct about its own risks, and the guidance is worth reading before the feature list. The author says you run this at your own risk, that they are not responsible for anything, and that you should check the licence for full details before using the app or the source. The stronger request is about other people: please do not use the app to ruin the experience of other players, be responsible, and do not trade or use items from the internal list in local or online play. The README explains why that matters technically, saying it should go without saying, but that those items will ruin the experience of other players because they are not easily removable on a console without custom firmware. That is the sharpest practical constraint in the whole project. A console without custom firmware cannot undo what an internal item does, so a careless trade can permanently affect someone else's island. The second limit is the hardware requirement, and a custom firmware Switch with a botbase sysmodule is a prerequisite that a lot of people do not have and that is not straightforward to set up. ## The alternative approach, and what each one is good for There are two other ways to do this job, and the differences are about workflow rather than capability. The first is the one the project is explicitly replacing, editing the save files on a PC with NHSE, which the app was designed so you would not have to do, and which the README credits as the basis for the work. What that route means in practice is quitting the game, moving files around, and editing on a desktop instead of editing live. The second is the other direction, an approach that leaves the console alone entirely and treats the game as a black box, which means you accept only what the game itself exposes. The difference in approach between the two is worth stating plainly. The console route is fast and live, it can refresh the floor of the island while people are walking around, and it can freeze values so a value does not change under you, and in exchange it requires a modified console, it works inside the game's memory, and it carries the obligation not to use the tools that would affect other players. The PC route avoids the modified-console requirement and the exposure that comes with it. ## Conclusion Adopt ACNHMobileSpawner if you play Animal Crossing: New Horizons on a hacked Switch and want to edit inventory, villagers and map contents from a phone or desktop without quitting the game and hand-editing save files. Do not adopt it for online play with other people, because the README explicitly asks you not to trade internal items or spoil other players' sessions, and notes that such items are not easily removable on a non-custom-firmware console. Before you run it, confirm your console has custom firmware with sys-botbase or USB-Botbase installed, read the wiki for setup and troubleshooting, and check the release notes for compatibility with the game version you are running. ## FAQ ### What is ACNHMobileSpawner? It is a multi-tool app for Animal Crossing: New Horizons built in Unity, for mobile and desktop despite the name, designed to be used while you are playing so you do not have to manually edit saves on a PC. The README says it is confirmed working on Windows, Mac, Linux, Android and iOS. ### What hardware does ACNHMobileSpawner need? It requires a Switch running custom firmware with the sys-botbase or USB-Botbase sysmodule installed. The iOS builds are auto-built and untested, according to the README, and it asks users to read the wiki first for setup and troubleshooting. ### What can ACNHMobileSpawner change in a running game? It can inject and delete inventory items for all eight players, change Nook Miles and bells in the bank and wallet, change and replace villagers, adjust turnip prices and fluctuations, place and bulk spawn items on the map, spawn internal items, remove map items such as weeds and spoiled turnips, refresh the items on your island floor while logging visitors, freeze values, and create teleports. It can also hex edit raw RAM bytes in any Switch game. ### Is it safe to use ACNHMobileSpawner in online play? The README asks users not to use the app to ruin the experience of other players and not to trade or use items from the internal list in local or online play, noting that such items are not easily removable on a console without custom firmware. The author also states that you run the tool at your own risk. ## Sources - [berichan/ACNHMobileSpawner on GitHub](https://github.com/berichan/ACNHMobileSpawner) - [Issues](https://github.com/berichan/ACNHMobileSpawner/issues) - [License: GPL-3.0](https://github.com/berichan/ACNHMobileSpawner/blob/master/LICENSE) - [README](https://github.com/berichan/ACNHMobileSpawner/blob/master/README.md) - [Releases](https://github.com/berichan/ACNHMobileSpawner/releases) --- Hysen Labs editorial analysis, written from the project's own repository and release notes. Cite the canonical page: https://hysenlabs.com/projects/berichan-acnhmobilespawner