Terms of Use

Last updated: November 13, 2026 (added Nakshatra and Sharp, and updated SoniFi in App-specific notices); November 6, 2026 (updated IndeXplorer in App-specific notices); November 4, 2026 (added Osho Wisdom, SoniFi and BiteCheck to App-specific notices)

These terms cover the Sonicon Software website at sonicon.org and the Android apps we publish on Google Play. We have kept them short and in plain language.

Who we are

“Sonicon”, “we” and “us” mean Sonicon Software, the developer of this website and of the apps listed on our Apps page. For any question about these terms, email sonicon.software@gmail.com.

Accepting these terms

By using our website or installing or using one of our apps, you agree to these terms. If you do not agree, please do not use them. Google Play’s own terms also apply to anything you download from Google Play.

Your licence to use our apps

We give you a personal, non-exclusive, non-transferable licence to install and use our apps on devices you own or control, under these terms and Google Play’s terms. You may not sell, rent or sublicense an app, or pass it off as your own. We may update an app, change its features or stop offering it.

Purchases and refunds

Some apps offer optional in-app purchases, such as the one-time Pro unlock in ChargeSpec. All payments go through Google Play Billing and are handled by Google under Google Play’s terms. We never see your payment details. Refunds are handled by Google under Google Play’s refund policy; you can request one through Google Play. Where an app offers a restore option, you can restore a purchase on another device signed in to the same Google account.

Acceptable use

Please use our website and apps lawfully and fairly. Do not:

Intellectual property

The Sonicon name, our app names, logos, designs, text and code belong to Sonicon Software, except for third-party material that belongs to its owners. Using our website or apps does not give you any ownership of them. Where we publish an app’s source code under an open-source licence, that licence governs your use of the code.

Third-party services and links

Our website and apps rely on, or link to, services run by others, such as Google Play, Android, the AI services some of our apps connect to, and other websites. Those services have their own terms and privacy policies, and we are not responsible for them or for their content.

Provided “as is”

We work to make our website and apps accurate and reliable, but we provide them “as is” and “as available”. To the extent permitted by law, we make no promise that they will be error-free, uninterrupted, or suitable for a particular purpose. Nothing in these terms limits rights you have under consumer law that cannot be excluded.

App-specific notices

ChargeSpec

ChargeSpec is a calculation aid for licensed electricians. Its results and spec sheets are based on NEC 2023 data, and your jurisdiction may use another code cycle or local amendments. ChargeSpec is not a substitute for a licensed electrician, the code adopted where you work, a permit, or the judgement of the authority having jurisdiction. You are responsible for checking every result before you rely on it.

Decline

Decline blocks or silences calls using the rules you set, on your phone. It can miss unwanted calls or block calls you wanted, for example because of how a number is delivered, a rule you wrote, or Android or your phone maker stopping the app. Do not rely on Decline for emergency or other critical calls, and check its log if you are expecting an important call.

Critical Velocity Calculator

Critical Velocity Calculator is a calculation aid for tunnel ventilation and fire-safety engineers. It applies the SEDH Handbook and NFPA 502 (2017, 2020 and 2026) equations shown in the app to the values you enter, and its results can be wrong for your tunnel: a method has limits and may not suit your tunnel or fire scenario, a mistyped or inconsistent input gives a wrong result, an edition may have been amended or replaced where you work, and the app does not check your inputs against the real tunnel or ventilation system. Do not use it as a design approval or a code-compliance check, and do not use a result without checking it against the edition and amendments that govern your project and having a qualified engineer review it. You are responsible for checking every result before you rely on it.

Greyscale

Greyscale plays sound. It is not a baby monitor or a sound-level meter, and it does not watch over anyone. Its volume cap limits only Greyscale's own sound, not your phone's volume or a connected speaker, and the app cannot tell how loud it is in the room. Some phones stop apps in the background, so playback can end before you expect. Place the phone away from a child's cot, keep the volume low, and do not rely on Greyscale to keep playing for a set time or to alert you to anything.

IndeXplorer

IndeXplorer copies, moves, renames and deletes files when you tell it to, on your device and on servers you connect, and it can install and uninstall apps through Android's own dialogs. Only local storage it can write to has a trash; a delete in folders you picked, inside an archive or on a server is permanent, and a move into a zip can't be undone. The duplicate finder treats files with the same size and SHA-256 hash as copies and moves the ones you don't keep to the trash; check them before you empty it. An app backup holds the app's APK files, not its data, so uninstalling an app deletes its data even if you backed it up. Batch rename shows a preview and can be undone, but a rename can still break links, playlists or other apps that point at the old names. Package files from outside Google Play can harm your device; install only files you trust. A failing card, a dropped connection, a server or another app can still damage or lose files. Keep a backup of anything you can't replace, and check that a copy is complete before you delete the original.

Osho Wisdom

Osho Wisdom is an unofficial reading companion. It is not affiliated with or endorsed by Osho International Foundation, Osho World Foundation or any other Osho organisation, and OSHO is a trademark of Osho International Foundation. The app quotes short excerpts and links to their sources; some excerpts have not been checked word for word against the full talk, and its Hindi text is a translation made for the app, not Osho's own words. Check a quote against its source before you publish or rely on it. Read aloud uses an AI voice that is not Osho's. The app gives no medical, psychological or spiritual advice, and Sit with this is a timer, not a guided practice. Rights holders can ask for content to be removed by writing to sonicon.software@gmail.com.

SoniFi

SoniFi is a troubleshooting aid for your own Wi-Fi network. Its findings, network score, outage attributions, speed results and coverage hints come from a few measurements taken by your phone, and they can be wrong: a router that ignores pings can look like it is down, Android can delay or limit checks and scans, short outages between checks can be missed, and a speed test measures the path to one server at one moment. Check the evidence the app shows before you replace equipment, change router settings or rely on its records in a dispute with your provider. Use ping, traceroute and port scan only on devices and networks you own or have permission to test.

BiteCheck

BiteCheck gives a meal or packaged food a general wellness score from a fixed set of rules. It is not medical, dietary or allergy advice, and it knows nothing about your health. Its results can be wrong: the vision model can misread a dish, a portion or how it was cooked; nutrition values describe typical recipes and are shown as approximate ranges; packaged-food data comes from Open Food Facts and may be incomplete or out of date; and the score leaves out salt, additives, allergens and other things that may matter to you. Do not rely on BiteCheck for allergies, a medical diet or any decision about a health condition; check the label and ask a qualified professional.

Nakshatra

Nakshatra is an aid for astrology and panchang calculations. It works out a kundli, dasha periods, a daily rashifal and card, and panchang timings from the birth details you enter, using one set of methods. Its planet positions and times can differ from other sources: other software can give a different lagna, planet degrees, dasha dates or panchang times, a wrong birth time or place changes the results, and panchang times are for your saved birth place, not where you are. Its readings are traditional astrology shown for reflection, not predictions or advice. Do not rely on its readings, timings or match scores for medical, financial, legal or marriage decisions, or for anything that affects your safety.

Sharp

Sharp is an aid for setting alarms, timers and calendar events, starting calls and messages, and handing actions off to other apps from a typed or spoken command. It can mishear or misread a command, pick the wrong action, fill in a wrong time, date or contact, or fail to open another app as expected, for example after that app changes. Messages, emails, calls, events and rides show a confirm card first: check it before you confirm. Alarms, opening a contact and directions can run straight away. Don't rely on Sharp for anything time-critical, such as an alarm you cannot afford to miss or an urgent call, without checking the result in the clock, calendar, phone or other app it opened. Answers from the optional Gemma 4 E2B model are generated on your phone and can be wrong.

Tools, games and AI apps

Our other tools and games are for personal use. Results from calculators, health scores and AI-generated text are aids, not professional, medical or engineering advice, and they can be wrong. Check anything important before you act on it.

Limitation of liability

To the extent permitted by law, Sonicon Software is not liable for any indirect or consequential loss, or for loss of data, profit or business, that arises from using or being unable to use our website or apps. Where the law does not allow us to exclude liability, our total liability is limited to the amount you paid us for the app concerned in the 12 months before the claim. Nothing here limits liability that cannot be limited by law, such as for fraud.

Privacy

How we handle your data is explained in our Privacy Policy.

Changes to these terms

We may update these terms from time to time. We will post the new version on this page and change the “Last updated” date above. If you keep using our website or apps after a change, the updated terms apply.