Last updated: February 10, 2026
By downloading, installing, accessing, or using Chargy ("the Software," "the Application," or "the App"), you ("the User," "you," or "your") agree to be bound by these Terms of Use ("Terms"). If you do not agree to all of these Terms, you must not download, install, or use the Software. These Terms constitute a legally binding agreement between you and the developer of Chargy ("we," "us," or "our").
Chargy is a macOS menu bar application designed for Apple Silicon MacBooks that provides the following services:
3.1 Chargy is provided as free software. Subject to your compliance with these Terms, we grant you a limited, non-exclusive, non-transferable, non-sublicensable, revocable license to download, install, and use the Software on any compatible Mac computer that you own or are authorized to use.
3.2 You may not:
3.3 You may freely redistribute unmodified copies of the Software in its original DMG format for non-commercial purposes.
4.1 Chargy requires the following to operate:
4.2 The Software is not compatible with Intel-based Mac computers. Running the Software on unsupported hardware or operating system versions may result in unpredictable behavior.
4.3 Certain features may behave differently depending on your specific Mac model, macOS version, and SMC firmware revision (e.g. Tahoe vs. pre-Tahoe firmware). We make no guarantee that all features will function identically across all supported configurations.
5.1 By installing and using Chargy's charge control features, you acknowledge and consent to the following system modifications:
smc_charged) is installed at /Library/PrivilegedHelperTools/ and runs with root (superuser) privileges/Library/LaunchDaemons/com.chargy.charged.plist to start the daemon automatically at boot with KeepAlive enabled/Library/Application Support/Chargy/5.2 All system modifications are fully reversible through the built-in "Full Uninstall" feature or by manually removing the installed files. Upon clean shutdown or uninstallation, the daemon restores all modified SMC keys to their default values.
5.3 The daemon requires root-level access because macOS restricts SMC write operations to privileged processes. This is standard practice for battery management applications on macOS. The administrator password you enter during installation is handled by the macOS authorization framework and is never stored, cached, or transmitted by Chargy.
6.1 Chargy interacts directly with your Mac's hardware through the SMC. While the Software uses the same well-documented SMC mechanisms used by Apple's own battery management and by other established tools, you acknowledge and accept the following:
6.2 You are solely responsible for:
7.1 Chargy includes an AI efficiency scoring algorithm that evaluates power usage and provides recommendations. This feature:
7.2 Efficiency scores, star ratings, and recommendations are approximate and are provided "as is." You should not rely solely on these metrics for making decisions about your battery management strategy.
THE SOFTWARE IS PROVIDED "AS IS" AND "AS AVAILABLE" WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, NONINFRINGEMENT, TITLE, QUIET ENJOYMENT, AND ACCURACY. WE DO NOT WARRANT THAT THE SOFTWARE WILL BE UNINTERRUPTED, ERROR-FREE, SECURE, OR FREE OF VIRUSES OR OTHER HARMFUL COMPONENTS. WE DO NOT WARRANT THAT THE SOFTWARE WILL MEET YOUR REQUIREMENTS OR THAT THE RESULTS OBTAINED FROM USE OF THE SOFTWARE WILL BE ACCURATE OR RELIABLE. THE ENTIRE RISK AS TO THE QUALITY, PERFORMANCE, AND RESULTS OF THE SOFTWARE IS WITH YOU.
WE MAKE NO WARRANTIES OR REPRESENTATIONS REGARDING THE ACCURACY OR COMPLETENESS OF ANY BATTERY HEALTH DATA, POWER READINGS, EFFICIENCY SCORES, TIME PREDICTIONS, OR RECOMMENDATIONS PROVIDED BY THE SOFTWARE. SUCH INFORMATION IS PROVIDED FOR INFORMATIONAL PURPOSES ONLY.
TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, IN NO EVENT SHALL THE AUTHORS, DEVELOPERS, CONTRIBUTORS, OR COPYRIGHT HOLDERS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, CONSEQUENTIAL, EXEMPLARY, OR PUNITIVE DAMAGES (INCLUDING BUT NOT LIMITED TO PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, LOSS OF USE, LOSS OF DATA, LOSS OF PROFITS, BUSINESS INTERRUPTION, BATTERY DEGRADATION, HARDWARE DAMAGE, OR ANY OTHER PECUNIARY LOSS) ARISING OUT OF OR IN CONNECTION WITH THE USE OR INABILITY TO USE THE SOFTWARE, WHETHER BASED ON WARRANTY, CONTRACT, TORT (INCLUDING NEGLIGENCE), STRICT LIABILITY, OR ANY OTHER LEGAL THEORY, EVEN IF WE HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
THIS LIMITATION APPLIES TO, BUT IS NOT LIMITED TO: (A) ANY DAMAGE TO YOUR BATTERY, MACBOOK, OR OTHER HARDWARE; (B) ANY LOSS OF DATA STORED ON YOUR DEVICE; (C) ANY INACCURACY IN BATTERY HEALTH READINGS, POWER MEASUREMENTS, OR PREDICTIONS; (D) ANY CONSEQUENCES OF THE CALIBRATION PROCESS; (E) ANY INTERACTION BETWEEN THE SOFTWARE AND MACOS UPDATES OR THIRD-PARTY SOFTWARE; (F) ANY SERVICE OR REPAIR COSTS FOR YOUR DEVICE.
You agree to indemnify, defend, and hold harmless the developers and contributors of Chargy from and against any and all claims, damages, losses, liabilities, costs, and expenses (including reasonable attorneys' fees) arising out of or in connection with: (a) your use or misuse of the Software; (b) your violation of these Terms; (c) your violation of any rights of a third party; or (d) any claim that your use of the Software caused damage to a third party.
11.1 Chargy is not affiliated with, endorsed by, sponsored by, or in any way officially connected with Apple Inc. ("Apple"). Mac, MacBook, macOS, Apple Silicon, MagSafe, and IOKit are trademarks of Apple Inc.
11.2 Use of Chargy may or may not affect your Apple warranty or AppleCare coverage. We make no representations regarding the impact of using the Software on any manufacturer warranty, service agreement, or insurance policy. You should consult Apple's warranty terms and your AppleCare agreement independently.
11.3 macOS updates may change SMC behavior, IOKit APIs, or system security policies in ways that affect the Software's functionality. We are not responsible for compatibility issues arising from operating system updates.
The automatic calibration feature performs a multi-phase cycle that:
This process takes several hours, temporarily overrides your charge limit settings, and involves a full charge-discharge cycle. By enabling this feature, you acknowledge that calibration cycles contribute to battery wear (though they are intended to improve battery gauge accuracy) and that the process should not be interrupted (e.g. by unplugging your Mac during the charging phase).
13.1 We are under no obligation to provide updates, patches, bug fixes, or new features for the Software. Any updates that may be provided are subject to these Terms unless accompanied by separate terms.
13.2 The Software does not include an automatic update mechanism. You are responsible for obtaining and installing any updated versions.
14.1 You may stop using Chargy at any time by using the built-in "Full Uninstall" feature in Settings, which removes the daemon, system files, preferences, history database, and the application itself.
14.2 You may also manually uninstall by: (a) unloading the launch daemon via launchctl, (b) deleting the daemon binary and plist, (c) removing the configuration directory, and (d) deleting the application from your Applications folder.
14.3 Upon proper termination (via the built-in uninstall or daemon shutdown), all modified SMC keys are restored to their default values, returning your Mac's charging behavior to normal.
14.4 Sections 8, 9, 10, and 11 of these Terms shall survive any termination or expiration of these Terms.
If any provision of these Terms is held to be invalid, illegal, or unenforceable by a court of competent jurisdiction, the remaining provisions shall continue in full force and effect. The invalid or unenforceable provision shall be modified to the minimum extent necessary to make it valid and enforceable while preserving its original intent.
These Terms, together with our Privacy Policy, constitute the entire agreement between you and us regarding your use of the Software and supersede all prior and contemporaneous understandings, agreements, representations, and warranties.
Our failure to enforce any right or provision of these Terms shall not constitute a waiver of such right or provision. Any waiver of any provision of these Terms will be effective only if in writing and signed by us.
You may not assign or transfer these Terms or your rights under these Terms, in whole or in part, without our prior written consent. We may assign our rights under these Terms without restriction.
You agree to comply with all applicable export control laws and regulations. You represent that you are not located in a country that is subject to a government embargo or that has been designated as a "terrorist supporting" country, and you are not listed on any government list of prohibited or restricted parties.
20.1 These Terms shall be governed by and construed in accordance with the laws of the jurisdiction in which the developer resides, without regard to its conflict of law provisions.
20.2 Any dispute arising out of or relating to these Terms or the Software shall first be attempted to be resolved through good-faith negotiation. If the dispute cannot be resolved through negotiation within thirty (30) days, either party may pursue resolution through the courts of competent jurisdiction.
20.3 You agree that any legal action or proceeding relating to these Terms shall be brought exclusively in the courts of the jurisdiction in which the developer resides, and you consent to the personal jurisdiction of such courts.
We reserve the right to modify, amend, or replace these Terms at any time at our sole discretion. When we make material changes, we will update the "Last updated" date at the top of this page. Your continued use of the Software after any changes to these Terms constitutes your acceptance of the revised Terms. If you do not agree to the revised Terms, you must stop using the Software and uninstall it.
If you have questions, concerns, or inquiries regarding these Terms of Use, please contact us: