Cal.com ↗
ProductivityScheduling for individuals, teams, and embedded bookings.
A visual habit tracker that turns daily completions into a calendar grid.
A visual habit tracker that turns daily completions into a calendar grid. Sebastian Roehl explicitly calls himself a solo indie developer in his January 18, 2026 update; the current HabitKit help center also describes solo development and maintenance. This is founder-authored staffing evidence rather than an independent headcount audit.
Free entry with paid premium access through platform-store subscriptions and lifetime purchases.
Source-linked product facts, followed by MRRTrace analysis of the customer problem, workflow, trade-offs and questions to test.
HabitKit makes personal routines visible through a calendar grid and a brief logging action. The official product page describes creating a habit, recording completions and reviewing history without account registration. Editorial interpretation: the benefit to test is whether a person can maintain a useful record with little effort. Interview users who abandon trackers as well as enthusiastic users. Ask what happened on an ordinary busy day, because a product that works only during a burst of motivation may have weak durable value.
Editorial analysis: a paid upgrade should correspond to a recurring reason to consult or maintain the record. Compare active logging, useful historical reviews and purchase restoration success across cohorts instead of treating downloads as retained demand. The January founder update explicitly discusses seasonal discovery; a new entrant should therefore compare acquisition and renewal outside the New Year period. Observe whether people use the grid to make a decision, adjust a routine or simply collect a visual streak. Those are different outcomes and could support different product priorities.
Observed channels and entry points; their performance is not inferred.
The January 11 founder update describes store-search visibility and seasonal demand for HabitKit. This is a dated founder account, not an independently measured causal attribution.
EvidenceA MRRTrace reading of public product material. Trade-offs and questions are editorial analysis.
The January 11 founder update separately names HabitKit at $31.5k MRR. This rounded recurring figure is retained without substituting the portfolio annual total or the later rolling 28-day revenue headline. Exact measurement date and currency code are unstated. Historical self-report, not verified receipts, profit or current income.
Original first-person founder disclosureFree download; Pro subscriptions and a lifetime option are documented. Exact current prices depend on the platform-store offer.
The source page may change its prices, limits, or offer after the recorded check date.
Study a simple daily logging loop and visual history, then test retention outside seasonal acquisition peaks.
These are MRRTrace observations, not statements by the founder or proof of a repeatable outcome.