For users with a certain body type, our regular body composition algorithm may not provide the most accurate body fat percentage measurement. This is especially common for users that are on the body building side of the body fat percentage scale (very low body fat percetnage combined with high muscle volume/large body circumferences). See the section below.
Prism currently provides the body composition methods listed below.
| Prism Method Name | User-friendly name | Notes | Recommendation | Release date |
|---|---|---|---|---|
coco2 |
Regular Mode | Most accurate method against DXA. Expanded body fat range accuracy and increased overall accuracy. Transitioning from coco_bri to coco2 will affect health report metrics. Please reach out for more information. |
This should be the default method for the majority of your users. Exception: graceful transition to coco2. | 7/23/2025 |
coco_bri |
Regular Mode (Legacy) | Very accurate method against DXA and a good balance against BIA scales/Inbody across all body types. | This method is for legacy users in the interim while planning a graceful transition to coco2. | 11/18/2024 |
army |
Army | This method provides an estimate for the general population. Accuracy is highest for individuals who are not very muscular, or obese. | Alternative for users who want to use the US Army method.` | 11/18/2024 |
army_athlete |
Athlete Mode | On average, this method provides more accurate body composition for the body building user type. | Use only if you have a population of users that are on the body building side of the body fat percentage scale (very low body fat percetnage combined with high muscle volume/large body circumferences) and typically know their body composition number. | 11/12/2024 |
| Scenario | Recommended Method | Notes |
|---|---|---|
| Regular, lean, or athletic users | coco2 |
Best mix of accuracy and coverage |
| Confirmed bodybuilder physique | army_athlete |
Still performs better in extreme cases |
| User unsure, wants comparison | Apply both via PATCH for different methods |
Compare results side-by-side |
Choose coco2 as the sole body composition method. This option is recommended for most partners, especially if your userbase doesn’t include a significant amount of athletic or very lean users.
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For currently active partners who are switching from coco_bri to coco2 :
Existing users’ body‑fat %, visceral‑fat, and related numbers will be nudged ±2 % on average closer to their real number. Please reach out to Prism Labs to discuss a graceful transition strategy.
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coco2 with army_athleteThe introduction of coco2 has significantly improved accuracy for most users—including lean or athletic individuals—rendering the old combination logic largely obsolete for them. As of this release, most users should default to coco2 only.
However, bodybuilders with extremely low body fat and high muscle mass still get better accuracy with Athlete Mode (army_athlete), which is still recommended in those specific cases.
Who needs Athlete Mode now?
Based on industry benchmarks: