{"licence":"CC BY 4.0","licenceUrl":"https://creativecommons.org/licenses/by/4.0/","citation":"Ambera Forge, Sleep tracking, September 2026","report":"https://forge.ambera.app/sectors/sleep-trackers/2026-09","note":"Counts are over the companies Forge read in this sector during the month, each with its denominator. Themes and capabilities are the words the reading listed; a theme with no declared match shares no word with anything a company declares, which is not the same as no product doing it. Carried market-size figures are their publishers’ and are not redistributed here.","version":1,"monthKey":"2026-09","sector":{"slug":"sleep-trackers","name":"Sleep tracking","scope":"Measuring sleep with a phone or a wearable and saying what it means."},"coverage":{"entities":6,"readEntities":4,"neverRead":2,"readInMonth":0,"lastReadAt":"2026-10-01T02:46:34.000Z"},"withheldReason":null,"declaredCapabilities":[{"name":"50+ health metrics tracking","listing":1,"denominator":3,"entityIds":["cmuohgdr100i8ofmykyn3825r"]},{"name":"activity score","listing":1,"denominator":3,"entityIds":["cmuohgdr100i8ofmykyn3825r"]},{"name":"AI-powered health guidance","listing":1,"denominator":3,"entityIds":["cmuohgdr100i8ofmykyn3825r"]},{"name":"body temperature tracking","listing":1,"denominator":3,"entityIds":["cmuohgdr100i8ofmykyn3825r"]},{"name":"CBT-I (cognitive behavioral therapy for insomnia) programs","listing":1,"denominator":3,"entityIds":["cmuohgdvt00icofmyslc8l7yw"]},{"name":"circadian alignment / sleep debt metrics","listing":1,"denominator":3,"entityIds":["cmuohgdvt00icofmyslc8l7yw"]},{"name":"circadian rhythm / energy timing prediction","listing":1,"denominator":3,"entityIds":["cmuohgdlu00i4ofmyaxoxj6yz"]},{"name":"energy peak/dip scheduling guidance","listing":1,"denominator":3,"entityIds":["cmuohgdlu00i4ofmyaxoxj6yz"]},{"name":"gentle alarm","listing":1,"denominator":3,"entityIds":["cmuohgdlu00i4ofmyaxoxj6yz"]},{"name":"guided meditations and sleep stories","listing":1,"denominator":3,"entityIds":["cmuohgdvt00icofmyslc8l7yw"]},{"name":"habit reminders (caffeine cutoff, blue light, workout timing)","listing":1,"denominator":3,"entityIds":["cmuohgdlu00i4ofmyaxoxj6yz"]},{"name":"heart rate monitoring","listing":1,"denominator":3,"entityIds":["cmuohgdr100i8ofmykyn3825r"]},{"name":"HRV and recovery insights","listing":1,"denominator":3,"entityIds":["cmuohgdr100i8ofmykyn3825r"]},{"name":"no wearable required","listing":1,"denominator":3,"entityIds":["cmuohgdlu00i4ofmyaxoxj6yz"]},{"name":"personalized sleep need calculation","listing":1,"denominator":3,"entityIds":["cmuohgdlu00i4ofmyaxoxj6yz"]},{"name":"phone-based sleep tracking (no wearable)","listing":1,"denominator":3,"entityIds":["cmuohgdvt00icofmyslc8l7yw"]},{"name":"readiness score","listing":1,"denominator":3,"entityIds":["cmuohgdr100i8ofmykyn3825r"]},{"name":"sleep debt tracking","listing":1,"denominator":3,"entityIds":["cmuohgdlu00i4ofmyaxoxj6yz"]},{"name":"sleep diary and personalized coaching","listing":1,"denominator":3,"entityIds":["cmuohgdvt00icofmyslc8l7yw"]},{"name":"sleep sounds/soundscapes","listing":1,"denominator":3,"entityIds":["cmuohgdvt00icofmyslc8l7yw"]},{"name":"sleep tracking and staging","listing":1,"denominator":3,"entityIds":["cmuohgdr100i8ofmykyn3825r"]},{"name":"snore detection","listing":1,"denominator":3,"entityIds":["cmuohgdvt00icofmyslc8l7yw"]},{"name":"sonar/microphone-based tracking","listing":1,"denominator":3,"entityIds":["cmuohgdvt00icofmyslc8l7yw"]}],"complaintThemes":[{"name":"accuracy limits of phone-only tracking vs. watches","listing":1,"denominator":4,"entityIds":["cmuohgdvt00icofmyslc8l7yw"]},{"name":"desire to avoid wearing anything to bed (wearable discomfort)","listing":1,"denominator":4,"entityIds":["cmuohgdvt00icofmyslc8l7yw"]},{"name":"device-to-device score discrepancy","listing":1,"denominator":4,"entityIds":["cmuohgdtf00iaofmy1uhk7ky2"]},{"name":"distrust after trying many apps that \"claim\" to help but don't work","listing":1,"denominator":4,"entityIds":["cmuohgdvt00icofmyslc8l7yw"]},{"name":"effectively requires pairing with a hardware tracker for best accuracy","listing":1,"denominator":4,"entityIds":["cmuohgdlu00i4ofmyaxoxj6yz"]},{"name":"high total cost of ownership vs subscription-free rivals","listing":1,"denominator":4,"entityIds":["cmuohgdr100i8ofmykyn3825r"]},{"name":"limited value of free tier (only three basic scores)","listing":1,"denominator":4,"entityIds":["cmuohgdr100i8ofmykyn3825r"]},{"name":"mandatory subscription to unlock most features","listing":1,"denominator":4,"entityIds":["cmuohgdr100i8ofmykyn3825r"]},{"name":"motionless-waking mistaken for sleep","listing":1,"denominator":4,"entityIds":["cmuohgdtf00iaofmy1uhk7ky2"]},{"name":"no native sleep-stage tracking or composite score","listing":1,"denominator":4,"entityIds":["cmuohgdlu00i4ofmyaxoxj6yz"]},{"name":"no permanent free tier","listing":1,"denominator":4,"entityIds":["cmuohgdlu00i4ofmyaxoxj6yz"]},{"name":"orthosomnia / score-chasing anxiety","listing":1,"denominator":4,"entityIds":["cmuohgdtf00iaofmy1uhk7ky2"]},{"name":"phone apps less precise than wearables","listing":1,"denominator":4,"entityIds":["cmuohgdtf00iaofmy1uhk7ky2"]},{"name":"poor wake-detection specificity","listing":1,"denominator":4,"entityIds":["cmuohgdtf00iaofmy1uhk7ky2"]},{"name":"preference for skill-building CBT approaches over generic calming content","listing":1,"denominator":4,"entityIds":["cmuohgdvt00icofmyslc8l7yw"]},{"name":"reliability depends on phone-only motion sensing vs. wearable data","listing":1,"denominator":4,"entityIds":["cmuohgdlu00i4ofmyaxoxj6yz"]},{"name":"short 7-day trial relative to calibration time needed","listing":1,"denominator":4,"entityIds":["cmuohgdlu00i4ofmyaxoxj6yz"]},{"name":"skepticism that relaxation apps address root causes of insomnia","listing":1,"denominator":4,"entityIds":["cmuohgdvt00icofmyslc8l7yw"]},{"name":"sleep stage misclassification","listing":1,"denominator":4,"entityIds":["cmuohgdtf00iaofmy1uhk7ky2"]},{"name":"subscription fatigue / preference for no-fee tracking","listing":1,"denominator":4,"entityIds":["cmuohgdvt00icofmyslc8l7yw"]}],"whiteSpace":{"rows":[],"unansweredCount":0,"belowFloor":20},"entities":[{"id":"cmuohgdj800i2ofmyymp90yib","slug":"sleep-cycle","name":"Sleep Cycle","kind":"competitor","site":"https://sleepcycle.com","lastWatchedAt":null,"addedBy":"definition"},{"id":"cmuohgdlu00i4ofmyaxoxj6yz","slug":"rise-science","name":"Rise Science","kind":"competitor","site":"https://risescience.com","lastWatchedAt":"2026-10-01T02:46:34.000Z","addedBy":"definition"},{"id":"cmuohgdoe00i6ofmyut1fsk05","slug":"pillow","name":"Pillow","kind":"competitor","site":"https://pillow.app","lastWatchedAt":null,"addedBy":"definition"},{"id":"cmuohgdr100i8ofmykyn3825r","slug":"oura","name":"Oura","kind":"adjacent","site":"https://ouraring.com","lastWatchedAt":"2026-10-01T02:46:34.000Z","addedBy":"definition"},{"id":"cmuohgdtf00iaofmy1uhk7ky2","slug":"accuracy-of-sleep-scores","name":"Accuracy of sleep scores","kind":"discourse","site":null,"lastWatchedAt":"2026-10-01T02:46:34.000Z","addedBy":"definition"},{"id":"cmuohgdvt00icofmyslc8l7yw","slug":"people-with-trouble-sleeping","name":"People with trouble sleeping","kind":"segment","site":null,"lastWatchedAt":"2026-10-01T02:46:34.000Z","addedBy":"definition"}],"entrants":{"placed":[{"id":"cmuohgdj800i2ofmyymp90yib","name":"Sleep Cycle","kind":"competitor","addedBy":"definition","addedAt":"2026-09-30T19:13:05.949Z"},{"id":"cmuohgdlu00i4ofmyaxoxj6yz","name":"Rise Science","kind":"competitor","addedBy":"definition","addedAt":"2026-09-30T19:13:06.044Z"},{"id":"cmuohgdoe00i6ofmyut1fsk05","name":"Pillow","kind":"competitor","addedBy":"definition","addedAt":"2026-09-30T19:13:06.139Z"},{"id":"cmuohgdr100i8ofmykyn3825r","name":"Oura","kind":"adjacent","addedBy":"definition","addedAt":"2026-09-30T19:13:06.226Z"},{"id":"cmuohgdtf00iaofmy1uhk7ky2","name":"Accuracy of sleep scores","kind":"discourse","addedBy":"definition","addedAt":"2026-09-30T19:13:06.311Z"},{"id":"cmuohgdvt00icofmyslc8l7yw","name":"People with trouble sleeping","kind":"segment","addedBy":"definition","addedAt":"2026-09-30T19:13:06.403Z"}],"sighted":[]},"entries":{"observed":0,"inference":0,"sourceBroken":0,"byTag":[],"byCategory":[]},"pricing":{"readEntities":4,"withPricing":0,"changesInMonth":0,"companiesChangedInMonth":0,"withheldReason":null,"companies":[{"entityId":"cmuohgdtf00iaofmy1uhk7ky2","name":"Accuracy of sleep scores","kind":"discourse","site":null,"changesInMonth":0,"latest":null},{"entityId":"cmuohgdr100i8ofmykyn3825r","name":"Oura","kind":"adjacent","site":"https://ouraring.com","changesInMonth":0,"latest":null},{"entityId":"cmuohgdvt00icofmyslc8l7yw","name":"People with trouble sleeping","kind":"segment","site":null,"changesInMonth":0,"latest":null},{"entityId":"cmuohgdlu00i4ofmyaxoxj6yz","name":"Rise Science","kind":"competitor","site":"https://risescience.com","changesInMonth":0,"latest":null}]},"funding":{"quartersConsidered":8,"readQuarters":0,"totalRounds":0,"currencies":[],"withheldReason":"Withheld: something was read in 0 of the last 8 quarters. A series needs at least 2 to say anything a single reading does not.","quarters":[]},"marketSize":{"readAt":null,"publishers":[]}}