This are the top 100 most popular Reference apps iOS iTunes USA today May 22, 2018. Browse the charts from other apps genres to find more amazing new apps to download.

1 Ancestry Ancestry
Ancestry.com
2 Hot Testoni App Hot Testoni App
Wilson Thomas
3 Big Brain Quiz Big Brain Quiz
Carlos Evans
4 Foretest Foretest
Alva Jonah
5 iSpeak - Voice translator iSpeak - Voice translator
Click & Translate
6 30 Day Bible Study 30 Day Bible Study
iDailybread Co., Limited
7 Horoscope - Daily Horoscope Horoscope - Daily Horoscope
Jonas Johnsson
8 Word Corner Word Corner
Barry Edith
9 Whitepages People Search Whitepages People Search
Whitepages.com
10 DeathAwake DeathAwake
beijinghaidian beijinghaidian
11 MyHeritage - Family tree MyHeritage - Family tree
MyHeritage.com
12 Intelius Reverse Phone Lookup Intelius Reverse Phone Lookup
PeopleConnect, Inc.
13 Sky Guide AR Sky Guide AR
Fifth Star Labs LLC
14 Muslim Pro - Ramadan 2018 Muslim Pro - Ramadan 2018
Bitsmedia Pte Ltd
15 Ghost Detector & Radar Tracker Ghost Detector & Radar Tracker
Jonas Johnsson
16 Night Sky Night Sky
iCandi Apps
17 Look Up - Reverse Phone Lookup Number & Caller ID Look Up - Reverse Phone Lookup Number & Caller ID
Appsverse Inc.
18 She Reads Truth She Reads Truth
She Reads Truth
19 Translate.com Platinum Translate.com Platinum
Emerge Media, Inc.
20 Daily Bible Verse Devotional Daily Bible Verse Devotional
Impressive Sounding, LLC
21 iDisciple iDisciple
iDisciple LLC
22 D&D Beyond D&D Beyond
Curse, Inc.
23 iTranslate Voice iTranslate Voice
iTranslate
24 Parallel Space -Multi accounts Parallel Space -Multi accounts
Nitish Kamra
25 Daily Bible Verse Inspirations Daily Bible Verse Inspirations
scott hamilton
26 iBird Pro Guide to Birds iBird Pro Guide to Birds
Mitch Waite Group
27 Drive Cloud for iCloud Devices Drive Cloud for iCloud Devices
Truong Manh
28 Bible by Olive Tree Bible by Olive Tree
HarperCollins Christian Publishing, Inc.
29 Dictionary.com: Search Words Dictionary.com: Search Words
Dictionary.com, LLC
30 Bird Song Id USA Automatic Recognition Birds Songs Bird Song Id USA Automatic Recognition Birds Songs
Mullen & Pohland GbR
31 Take a Name LDS Family History Take a Name LDS Family History
Kinpoint
32 Peterson Bird Field Guide Peterson Bird Field Guide
gWhiz, LLC
33 Speak & Translate: Translator Speak & Translate: Translator
Apalon Apps
34 Buddha Quotes Buddhism Dhamma Buddha Quotes Buddhism Dhamma
Daily Apps
35 The Holy Bible App The Holy Bible App
Texas PFCG Aplicativos Ltda
36 Scourby YouBible Scourby YouBible
Litchfield Associates Ltd, Inc
37 NIV Bible* NIV Bible*
Just1Word, Inc.
38 Bible Memory: Scripture Typer Bible Memory: Scripture Typer
Millennial Apps, LLC
39 Pleco Chinese Dictionary Pleco Chinese Dictionary
Pleco Inc.
40 Hot Hashtags for Instagram, Facebook & Twitter Hot Hashtags for Instagram, Facebook & Twitter
Yang Min
41 46 CFR - Shipping (LawStack Series) 46 CFR - Shipping (LawStack Series)
Tekk Innovations LLC
42 Camera Translator: Translate+ Camera Translator: Translate+
Vulcan Labs Co., Ltd
43 网易有道词典-7亿人都在用的外语学习翻译APP 网易有道词典-7亿人都在用的外语学习翻译APP
Beijing NetEase Youdao Computer System Co.,Ltd
44 The Sibley eGuide The Sibley eGuide
mydigitalearth.com
45 Reverso translation dictionary Reverso translation dictionary
Theo Hoffenberg
46 WolframAlpha WolframAlpha
Wolfram Group LLC
47 BirdsEye Bird Finding Guide BirdsEye Bird Finding Guide
Birds In The Hand, LLC
48 Mine Planet - for Minecraft PE Mine Planet - for Minecraft PE
Thuan Phat
49 Oxford English Dictionary 2017 Oxford English Dictionary 2017
MobiSystems, Inc.
50 Quran Pro Muslim القرآن الكريم Quran Pro Muslim القرآن الكريم
Quanticapps Ltd
51 e-Sword LT: Bible Study to Go e-Sword LT: Bible Study to Go
Rick Meyers
52 Bible Gateway Bible Gateway
HarperCollins Christian Publishing, Inc.
53 2017 EMRA Antibiotic Guide 2017 EMRA Antibiotic Guide
Emergency Medicine Residents' Association
54 Parallel Space-Multi Accounts Parallel Space-Multi Accounts
Abhay Vala
55 iBird Ultimate Guide to Birds iBird Ultimate Guide to Birds
Mitch Waite Group
56 ASVAB Mastery: AFQT Practice ASVAB Mastery: AFQT Practice
Higher Learning Technologies
57 The Study Bible The Study Bible
Grace To You
58 LogFinder LogFinder
HARRATIVE LTD
59 People Search by PeopleLooker People Search by PeopleLooker
PeopleLooker LLC
60 Quran Explorer Quran Explorer
Noble Education Foundation, Inc.
61 Translator Speak and Translate Translator Speak and Translate
Dimitri Bichihin
62 Merriam-Webster Dictionary Merriam-Webster Dictionary
Merriam-Webster, Inc.
63 小学館 ロベール 仏和大辞典 小学館 ロベール 仏和大辞典
物書堂
64 NIMS ICS Guide NIMS ICS Guide
Informed Publishing
65 Dictionary.com Pro Word Search Dictionary.com Pro Word Search
Dictionary.com, LLC
66 Snap Upload Caption : Safe upload & Quick save Snap Upload Caption : Safe upload & Quick save
KWOK YIN HEUNG
67 Quotes Quote of the Day Quotes Quote of the Day
Daily Apps
68 Song Sleuth: Auto Bird Song ID Song Sleuth: Auto Bird Song ID
Wildlife Acoustics
69 SkySafari 6 Pro SkySafari 6 Pro
Simulation Curriculum Corp.
70 PANTONE Studio PANTONE Studio
Pantone
71 Knots 3D Knots 3D
Nynix
72 FNAF Maps for Minecraft PE FNAF Maps for Minecraft PE
NuApps
73 Athan Pro - Ramadan 2018 Athan Pro - Ramadan 2018
Quanticapps Ltd
74 Verses - Bible Memory Verses - Bible Memory
Verses, Ltd. Co.
75 iBird Plus Guide to Birds iBird Plus Guide to Birds
Mitch Waite Group
76 LDS Daily Verse LDS Daily Verse
LDS Mobile Apps LLC
77 Sneakaboo Save - snap photo editor & save to share Sneakaboo Save - snap photo editor & save to share
Aifang Wang
78 St. Josemaria St. Josemaria
EBSolutions
79 SCRABBLE Dictionary SCRABBLE Dictionary
Merriam-Webster, Inc.
80 DVO: Daily Devotionals, Bible Verses and Quotes DVO: Daily Devotionals, Bible Verses and Quotes
AlphaPod Sdn. Bhd.
81 Bible Audio Bible Audio
HarperCollins Christian Publishing, Inc.
82 Minnesota Wildflowers Info. Minnesota Wildflowers Info.
MN Flora Group LLC
83 NY Penal Law 2018 NY Penal Law 2018
PDA Wizard
84 Cheat Sheet Guide for Fortnite Cheat Sheet Guide for Fortnite
Craig Kerns
85 iQuran iQuran
Beehive Innovations Services
86 Learner's Dictionary - English Learner's Dictionary - English
Merriam-Webster, Inc.
87 NH Laws, New Hampshire Codes NH Laws, New Hampshire Codes
Nirmala T V
88 artDatabase - The Art Guide artDatabase - The Art Guide
totiherms
89 Sasol eBirds Sasol eBirds
mydigitalearth.com
90 NFPA 70®: NEC® 2017 Edition NFPA 70®: NEC® 2017 Edition
NFPA
91 Daily Quotes: Quote Of The Day Daily Quotes: Quote Of The Day
Dragon Game Studio
92 ARE 5 Architecture Flashcards ARE 5 Architecture Flashcards
Higher Learning Technologies
93 Pocket Wiki for Stardew Valley Pocket Wiki for Stardew Valley
Dmytro Momotov
94 Merriam-Webster Dictionary Pro Merriam-Webster Dictionary Pro
Merriam-Webster, Inc.
95 Fighter Verses: memorize Bible Fighter Verses: memorize Bible
Children Desiring God
96 Bible — Bible Verse Of The Day Bible — Bible Verse Of The Day
Dragon Game Studio
97 CCW – Concealed Carry 50 State Guide CCW – Concealed Carry 50 State Guide
Workman Consulting LLC
98 Mushroom Identifier and Guide Mushroom Identifier and Guide
Kosareva Svetlana
99 bt notice app in remote device - smart bluetooth bt notice app in remote device - smart bluetooth
Essentials Store
100 The Warbler Guide The Warbler Guide
Princeton University Press

The top 100 Reference apps chart is updated daily using actual iTunes data.