What is the best alternative to The Image Converter □ on iPhone?

The Vector Converter, A tier, #2 in image conversion.

Is there a free alternative to The Image Converter □?

Yes: The Vector Converter (A tier, #2) is free to download, with in-app purchases.

No. The Image Converter □ is #1 in image conversion.

The Image Converter □ is S tier, #1 of the 7 tiered apps in image conversion. Here is everything that competes with it on iPhone, in tier order.

2
The Vector ConverterA
Free + IAP · ★ 4.6 · 15,538 ratings · score 84
Converts files between many vector and image formats, using a cloud server or local conversion for some types.
3
Image Converter: JPEG PDF HEICA
Free + IAP · ★ 4.7 · 12,393 ratings · score 81
Converts images to more than 20 output formats, including TIFF, GIF, JPG, PNG, PDF, SVG and WebP.
4
JPEG-PNG Image file converterB
Free download · ★ 4.6 · 65,368 ratings · score 79
Converts images to JPEG or PNG and saves the results to the Photos app.
5
HEIC to JPEG - Image ConverterB
Free + IAP · ★ 4.3 · 1,970 ratings · score 74
Converts HEIC photos from the iPhone camera to JPEG so they can be shared via AirDrop.
6
Image Converter: photos to PDFD
Free + IAP · ★ 4.7 · 3,194 ratings · score 60
Converts images between popular formats such as PDF, JPG, PNG, SVG and HEIC, with a conversion history tab.
7
JPG PNG Image, Photo ConverterD
Free + IAP · ★ 4.4 · 2,716 ratings · score 50
Converts images between JPEG, JPG, PNG and HEIF (.heic) formats and saves them to the iOS Photos app.

What is the best alternative to The Image Converter □ on iPhone?: The Vector Converter, A tier, #2 in image conversion.
Is there a free alternative to The Image Converter □?: Yes: The Vector Converter (A tier, #2) is free to download, with in-app purchases.
Does anything rank above The Image Converter □?: No. The Image Converter □ is #1 in image conversion.