What is the best alternative to iAzkar - آي أذكار on iPhone?

Dhikr & Dua - ذكر و دعاء, S tier, #1 in islamic supplications.

Is there a free alternative to iAzkar - آي أذكار?

Yes: Dhikr & Dua - ذكر و دعاء (S tier, #1) is free, with no in-app purchases.

Yes. 5 apps rank above it in islamic supplications: Dhikr & Dua - ذكر و دعاء (#1), Adhkar - Morning & Evening (#2), Dua & Azkar (#3) and more.

iAzkar - آي أذكار is C tier, #6 of 8 in islamic supplications. Here is everything that competes with it on iPhone, in tier order.

1
Dhikr & Dua - ذكر و دعاءShigher tier
Free · ★ 4.9 · 12,623 ratings · score 96
Free Reference app with 500+ dhikr and duas, translation, transliteration, audio, a counter, and over 100 articles.
2
Adhkar - Morning & EveningAhigher tier
Free download · ★ 4.4 · 3,192 ratings · score 86
IOS app for morning and evening adhkar with guided reading, a misbaha counter, audio, Hisn al-Muslim duas, and a Quran.
3
Dua & AzkarBhigher tier
Free download · ★ 4.8 · 8,922 ratings · score 74
Reference app with Duas and Adhkar grouped into chapters, with Arabic, Bangla and Urdu translations and daily reminders.
4
Muslim Muna: Azkar Quran AthanC
Free download · ★ 4.7 · 9,851 ratings · score 68
IOS utility app with offline Quran audio, Athan and prayer time alerts, Qibla compass, azkar reminders and a Hijri.
5
Hisnul Muslim - حصن المسلمC
Free + IAP · ★ 4.8 · 3,530 ratings · score 66
Reference app of Islamic supplications (duas) from the Quran and Sunnah, with audio, search, favorites and sharing.
7
Memorize Easily | Muslim Pal®C
Free + IAP · ★ 4.6 · 4,360 ratings · score 63
Education app for memorizing the Quran, duas and the 99 Names of Allah, plus a Qibla compass and prayer times.
8
حصن المسلم | Hisn AlMuslimF
Free · ★ 4.3 · 2,626 ratings · score 38
Free Hisn Al-Muslim app offering Dhikr texts with explanations, audio recitations, a counter, and translations into 20+.

What is the best alternative to iAzkar - آي أذكار on iPhone?: Dhikr & Dua - ذكر و دعاء, S tier, #1 in islamic supplications.
Is there a free alternative to iAzkar - آي أذكار?: Yes: Dhikr & Dua - ذكر و دعاء (S tier, #1) is free, with no in-app purchases.
Does anything rank above iAzkar - آي أذكار?: Yes. 5 apps rank above it in islamic supplications: Dhikr & Dua - ذكر و دعاء (#1), Adhkar - Morning & Evening (#2), Dua & Azkar (#3) and more.