Sadharo is a guided practice app for standing on a sadhu board — a board of nails — that runs on iPhone, Android, Apple Watch and Wear OS. You rate your tension and energy from 1 to 10 before a session, the app runs a countdown and timer with optional breathing guide, bell and voice, then records how you feel afterwards and averages the shift over time. It ships with three step-by-step programs spanning 21 to 80 days, seven animated technique lessons, 36 achievements and 16 languages.
What is Sadharo?
Sadharo is a timer-and-progress app for sadhu board practice. Its input is a short pre-practice check-in (tension and energy, each rated 1 to 10) plus your board's nail spacing and your body weight; its output is a timed standing session, a streak and record history, and a before/after report showing the average change in tension and energy across practices. It runs on iPhone, Android, Apple Watch and Wear OS, and is published by Sadharo (sadharo.app). Day one is deliberately one minute, seated on a chair.
What makes Sadharo stand out?
- Before/after measurement — Every session opens with a five-second tension and energy rating; the app compares it to a post-practice rating and shows the average shift. A sample 30-practice report on the site shows tension moving 6.6 to 3.1 and energy 4.6 to 7.6.
- Goals tuned to your board — You enter nail spacing on a 6 (softest), 8, 10 (classic), 12 or 15 (deep) scale plus your weight and shoe size; the app estimates load per nail (at 70 kg and EU 40, roughly 174 nails under one foot and 201 g per nail) and adjusts goals.
- “Scared?” button on the timer — Offers 5-5-5 breathing, a countdown from 100 and explicit signs for when to step off the board.
- Lock Screen and widget control — A Live Activity with Pause and Finish buttons, a goal ring and streak widget, a large ring in StandBy, and voice start via Siri or Control Center; on Android a play-button widget and a practice notification that switches on Do Not Disturb.
- Watch heart rate — Apple Watch starts, pauses and finishes a session from the wrist; Wear OS mirrors a practice started on the phone. Heart rate is sampled every 10 seconds and saved as a curve with the session; a Bluetooth chest strap works if you have no watch.
- Sound library — Om at 136.1 Hz, So Hum, Tibetan singing bowls, handpan, tanpura, a bell and a quiet voice, plus your own imported tracks.
- Group challenges — Up to ten people, a goal of 7, 14, 21 or 30 consecutive days, where a day counts only if everyone practiced and one missed day resets the streak for the whole group.
- Share templates — Ten export templates (time, streak, week, month, effect, heart-rate curve) rendered as a picture or a short video for stories or square posts.
Who should use Sadharo?
- First-time nail board owners: follow the free First 21 Days program from a one-minute seated stand to ten minutes standing, without guessing how fast to add time.
- Experienced standers: run the Pro 80-day Depth program at 10 to 20 minutes with silence and a firmer board.
- Data-driven practitioners: pair a watch or chest strap with the app to keep heart-rate curves and tension/energy trends in Apple Health or Health Connect.
- Friend groups and accountability partners: open a challenge so the streak only survives if all members practice on the same day.
What can you do with Sadharo?
- Nail board beginners: start seated on a chair for one minute with a guided countdown, breathing cues and an undo for accidental stops, so the first session stays calm rather than improvised.
- Habit builders: commit to a 21- or 40-day program with one task per day, and check the streak, record time and practice effect on the progress screen.
- Watch wearers: start a session from the wrist, watch live heart rate during the stand, and review the curve in history afterwards.
- Groups: invite friends by code or link, set a 7/14/21/30-day shared goal and see who has practiced today.
How does Sadharo work?
- Note how you feel: rate tension and energy from 1 to 10 before stepping on.
- Step on when ready: a short countdown starts the timer; breathing guide, bell and voice are optional, and one tap undoes an accidental stop.
- See what changed: the app stores streak, record time, total time on the board and the tension shift after every practice.
A typical session timeline the app displays on the timer runs from the sharp first seconds, through the peak around 30 seconds and the warmth at one minute, to fading sharpness somewhere between minutes 5 and 10.
Pricing
The free Sadharo tier is free forever with no sign-up and includes the timer, countdown, breathing and bell, the First 21 Days program, history, streak, records and backups, basic sounds, and challenges with friends. Sadharo Pro starts with a 7-day free trial and is priced at $39.99 per year (shown as 67% off), $9.99 per month or $79.99 lifetime, adding the 40- and 80-day programs, all sounds, mantras and technique lessons, heart rate from watch or strap, effect analytics, multiple boards and streak freeze. Prices are listed in US dollars and displayed in local currency by the App Store and Google Play.
FAQ
Which sadhu board do I need?
Any sadhu board or nail board works, bought or homemade. You enter the board's nail spacing using the app's 6-to-15 scale and the program goals adjust to it, since closer nails spread weight over more points and feel softer.
How long should the first session be?
One minute, sitting on a chair. The free First 21 Days program then builds toward standing, with time increasing only as you get comfortable — the program's own target is 10 minutes standing on day 21.
Is there an iPhone and Android version?
Yes, plus Apple Watch and Wear OS. History can move between platforms when you sign in with Apple or Google; without signing in, all data stays on the phone. Seven short technique lessons and 16 languages are supported.
Does standing on a sadhu board hurt?
The first seconds feel sharp and then usually ease, though the app states this is a typical pattern rather than a promise. If you feel sharp pain, numbness or dizziness, the instructions are to step off at once; the timer's Scared? button walks through breathing and counting.
