apps/mobile/src/features/usage/UsageRouteScreen.tsx      |  94 ++++++++++++++++++-----
 apps/mobile/src/state/usage.ts                           |  12 ++-
 apps/server/src/usage/UsageService.ts                    |  32 +++++++-
 apps/server/src/usage/usageAggregation.test.ts           |  74 +++++++++++++++++-
 apps/server/src/usage/usageAggregation.ts                | Bin 6019 -> 7388 bytes
 apps/web/src/components/usage/UsagePage.tsx              | 131 ++++++++++++++++++++++++--------
 apps/web/src/components/usage/UsageProviderChart.test.ts |  25 ++++++
 apps/web/src/components/usage/UsageProviderChart.tsx     | 105 +++++++++++++++++--------
 apps/web/src/state/usage.ts                              |  12 ++-
 docs/README.md                                           |   1 +
 docs/user/usage.md                                       |  10 +++
 packages/contracts/src/usage.ts                          |  19 ++++-
 packages/shared/src/usageFormat.test.ts                  |  57 ++++++++++++++
 packages/shared/src/usageFormat.ts                       | 120 ++++++++++++++++++++++++++++-
 packages/shared/src/usageMerge.test.ts                   |  26 +++++++
 packages/shared/src/usageMerge.ts                        |  45 +++++++++++
 16 files changed, 668 insertions(+), 95 deletions(-)