Best Open Standards Apps

67+ iOS apps curated and reviewed

4.2 avg rating

19 free apps

Updated June 2026

If you already know OSHA Safety Standards, this is the deeper bench. 67+ open standards apps for iPhone, all reviewed and ranked by user rating, recency, and download trend as of June 2026.

Compare top Open Standards Apps (June 2026)

#	App	Price	Rating	Ads	In-App Purchases	Updated
1	OSHA Safety Standards	Free	4.7★ (31)	No	No	Aug 2026
2	Guitar Tuner	Free	4.6★ (3.8K)	Yes	No	Sep 2026
3	Open-Map	$2.99	4.0★ (1)	No	No	Aug 2026
4	The Open Group	Free	—	Yes	No	May 2026
5	Element X - Secure Chat & Call	Free	3.4★ (150)	No	No	Sep 2026
6	Standard Guitar Tuner	Free	—	Yes	No	Jul 2026
7	MA Standards	Free	3.6★ (5)	No	No	May 2026
8	BIS LMS	Free	—	No	No	Aug 2026

Top Picks for Open Standards

OSHA Safety Standards by Open Source Consulting LLC

All regulations and guidelines

Editor's Choice

🔍 Reference

4.7(31 ratings)

Free

Access all Occupational Safety and Health Administration (OSHA) standards and regulations instantly from your phone. This app provides comprehensive, free access to the entire OSHA standards library, with full offline functionality and automatic updates.

Guitar Tuner by Alvin Yu

Strong Contender

🔧 Utilities

4.6(3.8K ratings)

FreeAds

Tune your 6-string guitar with precise reference notes. Supports standard tuning and more. Ensure your device is not on silent to hear the tuning tones.

Open-Map by Roberto Panetta

Multiformat open standard maps

Worth Considering

🌟 Lifestyle

4.0(1 ratings)

$2.99

Explore the world with over 60 interactive map types, offering diverse styles and up-to-date data. Easily switch between maps while preserving your position and zoom level. Ideal for cartography enthusiasts and anyone interested in varied map representations.

More Open Standards apps to explore

The Open Group

by Association of Enterprise Architects

Free

🔍 Reference

(0)

Element X - Secure Chat & Call

Sovereign. Seamless. On Matrix

Free

Communicate securely and privately with instant messaging and video calls. This app offers robust features for individuals and communities, allowing you to own your data and choose where it's hosted. Enjoy real-time communication with synchronized history across all your devices.

Real-time messagingVideo callsPublic and private rooms

🌐 Social Networking

(150)

free

Standard Guitar Tuner

Acoustic, electric & 7-string

Free

This application provides an intuitive and precise way to tune your guitar using your device's microphone. It offers visual feedback for accurate tuning and supports a wide range of custom tunings, along with adjustable reference frequencies.

Internal microphone tuningAdvanced signal processingIntuitive tuning indicator

by Massachusetts Executive Office of Education

Free

Access Massachusetts curriculum frameworks and explore learning standards. Find resources like student work, assessment items, and definitions. Plan lessons with a mapping feature showing standard relationships.

Standards NavigatorExplore learning standardsRelated resources (work, assessments, definitions)

by NATO Standardization Office

Free

Access and download NATO Standards directly on your mobile device. Store documents for offline reading. This official app provides a convenient way to manage important standardization information.

Browse NATO StandardsDownload NATO StandardsRead offline

by ISO, International Organization for Standardization

Explore GitHub orgs & repos

Free

Explore public GitHub repositories within any organization. Discover, analyze, and connect with open-source work, filter by language or activity, and view contributor profiles. Ideal for developers, security analysts, and recruiters.

View public repositories by organizationSearch and filter repositoriesExplore contributor profiles

🔧 Utilities

(4)

freemium

APESB Professional Standards

by Accounting Professional & Ethical Standards Board Limited

Free

💼 Business

(0)

SAE International Events

by SAE

Free

This app provides access to information and resources for professionals in the aerospace, automotive, and commercial-vehicle industries. It focuses on lifelong learning and standards development, supporting educational programs and technical expertise.

Industry professional networkingAccess to technical standardsLifelong learning resources

Visualize normas ABNT NBR NM

Free

Access a vast, daily updated library of over 17,000 technical standards on your mobile device. Features include text-to-speech, annotations, and advanced search capabilities. Standards purchased online are automatically synced.

Daily updated library of 17,000+ standardsVoice text readerMarkings and annotations

🔍 Reference

(0)

free with in-app purchases

TUNY: Tuner for Guitar & more

Ukulele, Bass, String tuning

Free

This app provides a precise and adaptable tuning experience for a wide range of stringed instruments, including guitar, bass, and ukulele. It offers over 100 predefined tunings, capo support, and custom tuning options for personalized sound.

Over 100 predefined tuningsCustom tuning creationCapo support

🎵 Music

(251)

free with in-app purchases

Guitar & Ukulele Tuner

Achieve the perfect sound

Free

This app provides precise digital tuning for various stringed instruments, including guitars and ukuleles. It offers multiple tuning profiles and an automatic mode for ease of use, ensuring perfect sound for both professionals and hobbyists.

Precise digital tuning algorithmChromatic tunerMultiple tuning profiles

🔧 Utilities

(515)

free with in-app purchases

OGC Agora

by Open Geospatial Consortium, Inc

Free

This official companion app serves as a digital meeting place for a professional community. It allows users to join meetings, share updates, ask questions, and stay informed about ongoing activities and research. Mobile access ensures continuous connection and participation from anywhere.

Join meetingsPost updatesAsk questions

Open, federated SIP messaging

Free

This app provides secure audio and video calls, messaging, and file transfers using the SIP protocol. It supports multiple devices, call recording, and end-to-end encryption for all communications.

Audio and video callsSIP messagingAudio call recording

This app provides AmRest employees with instant access to operational standards and best practices. It serves as a central knowledge hub, ensuring employees can quickly find and adhere to company guidelines anytime, anywhere.

Access operational standardsAccess processesStay aligned with best practices

Public Information Search

Free

This tool gathers and organizes publicly available information from open sources. It presents search results like links, articles, and images in a structured card format for easy review and navigation. Save, revisit, and share your organized findings.

Search public informationCollect links, articles, imagesOrganize findings into cards

🔧 Utilities

(15)

free with in-app purchases

FAQ about Open Standards

What are the best open standards apps for iPhone?

OSHA Safety Standards tops our open standards apps ranking as of June 2026, with a 4.7-star average from 31 App Store ratings, and it's free to download.

Are there free open standards apps for iPhone?

Yes — 19 of the top open standards apps we rank are free to download, including OSHA Safety Standards and Guitar Tuner.

Does OSHA Safety Standards have ads or in-app purchases?

OSHA Safety Standards has no ads and has no in-app purchases, according to its App Store listing as of June 2026.

How many open standards apps are on the App Store?

We track 67+ open standards apps on the iOS App Store as of June 2026, ranked by rating, recency, and analysis of real user reviews.

What is OSHA Safety Standards?

OSHA Safety Standards is a mobile application that provides users with free, instant access to the complete Occupational Safety and Health Administration (OSHA) standards and regulations. It is designed for quick and convenient reference, even without an internet connection.

Can I use OSHA Safety Standards offline?

Yes, the app features full offline functionality. You can download the entire OSHA standards library to your device, ensuring access to critical information even in areas with limited or no internet connectivity.