What is the best alternative to MyLabcorp on iPhone?

Carrot Care: Bloodwork Tracker, S tier, #1 in blood test tracking.

Is there a free alternative to MyLabcorp?

Yes: Carrot Care: Bloodwork Tracker (S tier, #1) is free to download, with in-app purchases.

Yes. 2 apps rank above it in blood test tracking: Carrot Care: Bloodwork Tracker (#1), Evolve: Bloodwork Insights (#2).

MyLabcorp is A tier, #3 of the 6 tiered apps in blood test tracking. Here is everything that competes with it on iPhone, in tier order.

1
Carrot Care: Bloodwork TrackerShigher tier
Free + IAP · ★ 4.4 · 330 ratings · score 86
Free app to track and understand bloodwork, body measurements, stress, nutrition and sleep over time.
2
Evolve: Bloodwork InsightsA
Free download · ★ 4.5 · 6 ratings · score 84
Keeps lab results in one place and plots each biomarker over time against its reference range.
4
Health3: Blood Work TrackerA
Free + IAP · ★ 4.4 · 13 ratings · score 79
Stores blood test and lab results from PDFs, photos or manual entry, and tracks biomarker changes across reports.
5
BloodTrends: Bloodwork trackerB
Free + IAP · ★ 4.4 · 15 ratings · score 75
Uploads lab report PDFs, parses them into 50+ tracked biomarkers, and graphs results as trends over time.
6
Marker: Longevity BloodworkF
Free + IAP · ★ n/a · 0 ratings · score 49
Logs longevity bloodwork panels and charts each marker against cited optimal targets over time.

What is the best alternative to MyLabcorp on iPhone?: Carrot Care: Bloodwork Tracker, S tier, #1 in blood test tracking.
Is there a free alternative to MyLabcorp?: Yes: Carrot Care: Bloodwork Tracker (S tier, #1) is free to download, with in-app purchases.
Does anything rank above MyLabcorp?: Yes. 2 apps rank above it in blood test tracking: Carrot Care: Bloodwork Tracker (#1), Evolve: Bloodwork Insights (#2).