Table 3.

Approximate cost related to works which have provided an estimate.

Platform	Approximate Cost	Reference
Smartphone with fluorescence microscope attachment	Attachment of around $140, significantly reduced compared to the equipment costs for the reference method	[12]
Akvo Caddisfly	Expected to retail at $75, without the phone and mapping system, plus $0.3 for each test	[23]
PiBA assay coupled to LAMP	Reagent cost for PiBA is a fraction of a cent. Overall cost reduction is ~10-fold respect to the reference (fluorescence reagents for qPCR)	[26]
Smartphone-based analytical platform with homemade potentiostat	Based on CheapStat potentiostat which requires less than eighty dollars for its manufacturing, while the most commercial potentiostats cost a few thousands of dollars	[28]
Smartphone spectrometer	Entire assembly along with the smartphone can be realized under $250, while reference spectrometer platforms costs are $4000 and $1200	[32]