Comparison Mode for Metric Charts
Since the introduction of Custom Metrics, Memfault
provided various ways to define charts for plotting fleet-wide aggregations
(sum, count, min, max, mean). These charts are often used to visualize trends
over time (e.g. "hours between recharge") or to detect anomalies (e.g. "attempt
until successful connect") for a subset of the fleet. The controls in the
top-right corner allow for ad-hoc filtering by cohort and/or software version.

With the advent of the
Chart Comparison Mode, users can now
apply up to 4 such filters simultaneously to plot the resulting data series
side-by-side inside each custom chart.
Use this feature to visually compare your beta cohort against the production
fleet or to see at a glance if there are any regressions for key metrics between
the last software versions.
Linked Devices
Sometimes, products span across multiple devices: Each pair of wireless earplugs
has a left and right version, for each smart home installation there may be
multiple components in a network, or some related device information lives
outside of Memfault, and your workflow benefits from quick navigation to another
software system.

Memfault's Linked Devices provide convenient navigation in these scenarios. It
builds these connections by looking at Device Attributes that can be edited in
the UI, updated via API, or sent from devices at any time.
MCU Heap Visualization
Memfault can now
track and visualize heap allocations with any coredump
on a growing number of MCU Architectures starting with ARM Cortex-M, nRF Connect
SDK, ESP32 ESP-IDF, ESP8266, and Dialog DA1469x.

This optional debugging feature tags all heap allocations with their respective
size, address, and location of code that allocated it. Use it to understand
memory distribution, heap fragmentation, or to find memory leaks in an
out-of-memory situation in the field.
Managing Rate Limits
Memfault's frontend is now more upfront with the visualization of
quotas and rate limits that may affect large
projects.

When managing
Timeseries Metrics and Device Attributes, Memfault
informs about the number of remaining metrics for fleet-wide analytics. The
dedicated page at Settings→Quotas presents an overview.