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Those filters may also include user preferences for apps who do not want to do the personalization locally.
 
Those filters may also include user preferences for apps who do not want to do the personalization locally.
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==== Availability ====
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We can filter by country of availability, by store (or stores) of availability, and number of scans (a proxy for wide availability)
    
== Server-side indexing ==
 
== Server-side indexing ==
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=== Similarity ===
 
=== Similarity ===
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If we decide to support product match, we need to pre-compute and store lists of similar products.
    
=== Non personalized sort order ===
 
=== Non personalized sort order ===
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If we expect that the app will only offer "better" products and not worst products, we may include things like the Nutri-Score or NOVA in the sort order.
 
If we expect that the app will only offer "better" products and not worst products, we may include things like the Nutri-Score or NOVA in the sort order.
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==== Availability ====
  −
  −
We can filter by country of availability, by store (or stores) of availability, and number of scans (a proxy for wide availability)
      
==== Popularity ====
 
==== Popularity ====
    
We could also include a measure of product popularity (e.g. derived from scans) in the sort order.
 
We could also include a measure of product popularity (e.g. derived from scans) in the sort order.

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