What is the best alternative to Tasbih Dhikr Counter on iPhone?

Dhikr & Dua - ذكر و دعاء, S tier, #1 in dhikr practice.

Is there a free alternative to Tasbih Dhikr Counter?

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

Yes. 3 apps rank above it in dhikr practice: Dhikr & Dua - ذكر و دعاء (#1), Adhkar - Morning & Evening (#2), Dua & Azkar (#3).

Tasbih Dhikr Counter is C tier, #4 of the 7 tiered apps in dhikr practice. Here is everything that competes with it on iPhone, in tier order.

1
Dhikr & Dua - ذكر و دعاءShigher tier
Free download · ★ 4.9 · 38,503 ratings · score 95
Free Reference app with 500+ dhikr and duas, translation, transliteration, audio, a counter, and over 100 articles.
2
Adhkar - Morning & EveningAhigher tier
Free + IAP · ★ 4.4 · 32,369 ratings · score 89
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 · 42,315 ratings · score 75
Reference app with Duas and Adhkar grouped into chapters, with Arabic, Bangla and Urdu translations and daily reminders.
5
Adhkar AppC
Free download · ★ 4.9 · 2,777 ratings · score 65
Free iOS app for tracking daily morning, evening and night adhkar, with location-based reminders and an optional…
6
iAzkar - آي أذكارD
Free download · ★ 4.7 · 19,849 ratings · score 56
Arabic Islamic app that displays daily athkar in five sections, with background audio and morning and evening.
7
Hisn - حصنF
Free + IAP · ★ 4.8 · 2,522 ratings · score 43
Adhkar and supplications app based on the book Fortification of the Muslim, with Quran and Sunnah duas, audio.

What is the best alternative to Tasbih Dhikr Counter on iPhone?: Dhikr & Dua - ذكر و دعاء, S tier, #1 in dhikr practice.
Is there a free alternative to Tasbih Dhikr Counter?: Yes: Dhikr & Dua - ذكر و دعاء (S tier, #1) is free, with no in-app purchases.
Does anything rank above Tasbih Dhikr Counter?: Yes. 3 apps rank above it in dhikr practice: Dhikr & Dua - ذكر و دعاء (#1), Adhkar - Morning & Evening (#2), Dua & Azkar (#3).