# SrutiBox

> Indian harmonium simulator for drones, spiritual chanting, and musical practice. (iPhone/iPad app by Henry Lowengard.)

- Source: https://appshunter.io/ios/app/srutibox/id288419651 (this page in markdown: same URL + `.md`)
- Developer: [Henry Lowengard](https://appshunter.io/developer/288419654)
- Category: Music, Entertainment
- Price: $1.99
- Rating: 4.30/5 from 11 App Store ratings · 47 written reviews indexed
- Age rating: 4+
- Requires: iOS 7.1 · 13 MB
- Languages: American English
- Released: 2019-02-12
- Data updated: 2026-08-27
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/srutibox/id288419651/reviews.md

## What is SrutiBox?

SrutiBox simulates an Indian harmonium, used as a base tone in Indian music and in spiritual practices of chanting and droning. 

SrutiBox 1.4 now works under iOS8, iPhone 4,5,6, and 6+ sizes,  has a slightly different look, and fixes a few bugs that you may have encountered.

SrutiBox is a synthesizer, creating drones with various timbres and precise intonations that blur the distinction between tones, timbres and chords. The drone can be fairly static or undergo slow modulation and harmonic change. It now plays in the background under iOS 4.0 like many other music apps!

Pop over to http://www.jhhl.net/iPhone/SrutiBox/ and listen to some examples!

"I wanted you to know that I have made my debut in Vienna a couple of weeks ago as an iPHONEist. 
I played two simultaneously - one with sruti box and the other with a variety of apps.
I am enjoying sruti box immensely! Thank you!"
— Dr. Pauline Oliveros

I also have another Droning app, Droneo, which has a similar interface, but more droning options!

SrutiBox uses 12 "reeds" which can be tuned to a great number of scales, randomly detuned, and chorused and modulated. The pitch interval and  volume of each "reed" can be set individually, making for a wide variety of drones. The reeds can be set to various timbres suitable for drones, including vocal-like timbres and low frequency-friendly chirps. 

A special iPhone feature of SrutiBox is that you can wave the phone in an imitation of pumping the bellows, adding a touch of realism to the simulation. 

SrutiBox can also be used as a pitch source for instrument tuning purposes, or as an aid for learning the difference between Just and Equal Tempered intervals. 

As with other iPhone/iPod touch audio applications, it'll sound better through headphones, although in a quiet room, it's quite effective! Make sure to use the volume controls on the side of the phone to set  the volume level you like.

See the SrutiBox web pages for more information, hints, and possibly tales of YOUR performances and discoveries:
http://www.jhhl.net/iPhone/SrutiBox

It's also the place to ask for support and advice, or email tutti-srutti at jhhl.net

also: visit my iPhone App Facebook group for starting discussions etc!
http://www.facebook.com/group.php?gid=150360054839 

Thank You!

Check out  my other apps: Droneo, Tondo, the iPhone Wind Chimes, Lake Piano and Enumero!

## Key features

- Indian harmonium simulation
- Customizable drone timbres
- Precise intonation control
- Background audio playback
- Bellows-pumping realism
- Pitch source for tuning

## Recent user reviews (10 of 47)

All indexed reviews: https://appshunter.io/ios/app/srutibox/id288419651/reviews.md

### 2/5 — バックグラウンドでバッテリー浪費

*2023-04-13*

微分音の和音の検討に使用可能。…しかし、なんかバッテリーの減りが早いなと思っていたら、バックグラウンドで謎の処理が継続されていた。マイニングとかに利用されてないだろうな？？使用後はタスクキルが望ましい。

### 1/5 — Don’t buy/ doesn’t sound like sruthi box

*2022-04-25*

This app is useless, doesn’t sound anything like harmonium or sruthi box, doesn’t have intermediate tones like G# and is complete waste of your money. Their website link for information is not working either

### 1/5 — Not a Shruti Box

*2021-05-02*

Not user-friendly interface and doesn’t sound like Harmonium or Shruti box at all. Don’t buy it.

### 1/5 — Pathetic

*2021-03-06*

Just won’t play at a acceptable volume level with out external amplifier. Not a mobile solution

### 1/5 — Stupid App!!! Waste of $$$

*2020-11-03*

Doesn’t sound at all like a Shruti box.
COMPLETE RIP-OFF!!

### 5/5 — 👍👍👍

*2020-10-31*

I have been using this app for years. Love it. Dr. Pauline Oliveros?! That’s high praise.

### 1/5 — Not satisfied with the sound ...

*2018-03-10*

The sound produced is not similar to a Shruti box. I am disappointed with the purchase.

### 5/5 — great app...a must have

*2015-04-21, version 1.4.0*

this app has been good since 2008 but the 2014 iOS 8 updates rock! the app sounds great, looks great and it worth its weight in bytes.

get this app today!!

p.s., i gave the app 5 stars despite it missing audiobus support; my stars are freely given, without expectation of audiobus delivery later on. i would, however, pay for audiobus support.

### 5/5 — Beautiful

*2014-10-14*

Thank you for your huge effort to update this greet app!

### 5/5 — thank you for the update!

*2014-10-14*

essential app

## Frequently asked questions about SrutiBox

### What does SrutiBox do?

SrutiBox simulates an Indian harmonium, creating drones with various timbres and precise intonations. It is used for Indian music, spiritual chanting, and as a tool for learning about musical intervals.

### What are the key features of SrutiBox?

Key features include a realistic harmonium simulation, customizable drone timbres, precise intonation control for individual 'reeds,' background audio playback, and a unique bellows-pumping gesture control for added realism.

### How much does SrutiBox cost?

Based on the provided information, SrutiBox is a paid application. There is no mention of free versions, subscriptions, or in-app purchases.

### What devices is SrutiBox compatible with?

SrutiBox is compatible with iOS devices, specifically mentioning support for iOS 8 and iPhone models 4, 5, 6, and 6+. It also functions under iOS 4.0 for background playback.

### What are some common use cases for SrutiBox?

Common use cases include providing a base tone for Indian music, aiding in spiritual chanting and droning practices, serving as a pitch source for instrument tuning, and helping users learn the difference between Just and Equal Tempered intervals.

## Version history (last 5 releases)

### 1.4.0 — 2019-02-12

This update from Apple will improve the functionality of this app. No new features are included.

Updated for IOS8 (and iOS7!), and also for iPhone 4, 5,6 and 6+!
With a new, flatter look, same old SrutiBox inside though.

### 1.3 — 2010-08-19

New in Version 1.3:
-- Base frequency now has a fine tuning slider (a feature ported from Droneo). 
-- iOS 4.0 play-in-background enabled.

### 1.2.2 — 2009-10-09

Version 1.2.2 fixes some minor bugs and tweaks the available timbres a bit.
 - the base frequency can be set down to 0.01, which is good for impulse experiments.
 - new Impulse 2 timbre
 - faster building vocal timbres.
- bug having to do with non-scrolling Instructions fixed.

### V 1.2.1 — 2009-03-05

Rather a lot has been added to SrutiBox in V 1.2.1.

Features:
- "Churn" now controlled by tapping the churn/chorus slider label. No more "churn" button.
- New lower octave of pitch settings (A0, Bb0, etc.), useful for high harmonics.
- Churn now churns using distinct Timbre settings.
- UI reorganized to make that change more useful
- New info and save buttons
- Save called "Save" instead of "Add" in save screen.
- Saved settings save a whole "patch" and not just the reed volumes.
- New Impulse Timbre for low frequency explorations.

Fixes:

- Setting churn rate no longer resets the sound to use the left volume settings.
- Increased number of buffers to help get over some breaks when multi tasking.
- Vocal timbres now are generated more quickly - there's still a little gap in the sound when choosing them.

### V1.2.0 — 2008-12-09

No release notes.

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## More apps by Henry Lowengard

- [Droneo](https://appshunter.io/ios/app/droneo/id313811077)
- [Enumero](https://appshunter.io/ios/app/enumero/id390920716)
- [Synthicity Itself](https://appshunter.io/ios/app/synthicity-itself/id431319780)
- [Yes Session](https://appshunter.io/ios/app/yes-session/id441596152)
- [PolyHarp](https://appshunter.io/ios/app/polyharp/id961772600)

All apps by Henry Lowengard: https://appshunter.io/developer/288419654

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-27.*