Which app is best for tracking sleep?
asked 2026-11-02, three attempts per assistant, web search on · data
No consensus
No product was the first choice of three or more assistants.
| Assistant | Attempt 1 | Attempt 2 | Attempt 3 |
|---|---|---|---|
| ChatGPTgpt-6-luna | Sleep Cycle+2 named · 2 sources | Sleep Cycle+2 named · 2 sources | Sleep Cycle+1 named · 3 sources |
| Claudeclaude-sonnet-5-5 | Sleep as Android+3 named · 3 sources | Sleep as Android+2 named · 3 sources | Sleep as Android+3 named · 3 sources |
| Geminigemini-3.8-flash | Sleep Cycle+3 named · 2 sources | Sleep Cycle+3 named · 2 sources | Sleep Cycle+2 named · 3 sources |
| Perplexitysonar-pro | Garmin Connect+3 named · 3 sources | Garmin Connect+2 named · 2 sources | Garmin Connect+4 named · 2 sources |
Named by all four assistants across the round: AutoSleep, Pillow, Sleep Cycle, Sleep as Android.
What each assistant said
Sleep Cycle first in all three answers — the phone-on-the-mattress pick. Its named field covered the Android and wearable options (Sleep as Android, Pillow, AutoSleep) and it read sleepcycle.com, pillow.app, garmin.com and Reddit.
- First choice
- Sleep Cycle · Sleep Cycle · Sleep Cycle
- Also named
- Sleep as Android, Pillow, AutoSleep
- Read
- pillow.app, sleepcycle.com, garmin.com, reddit.com
Sleep as Android, three for three — the only assistant to pick it, and the only one to cite its developer site. Claude's reading also took sleepcycle.com, garmin.com, pillow.app and Reddit; it named every other option in the field.
- First choice
- Sleep as Android · Sleep as Android · Sleep as Android
- Also named
- AutoSleep, Garmin Connect, Pillow, Sleep Cycle
- Read
- sleepcycle.com, garmin.com, reddit.com, pillow.app, sleep-as-android.github.io
Sleep Cycle every time. Gemini was the middle reader — sleepcycle.com, the Sleep as Android site, pillow.app, garmin.com — and it named AutoSleep and the wearable route alongside the phone apps.
- First choice
- Sleep Cycle · Sleep Cycle · Sleep Cycle
- Also named
- Sleep as Android, Pillow, AutoSleep, Garmin Connect
- Read
- sleepcycle.com, sleep-as-android.github.io, pillow.app, garmin.com
Garmin Connect first in all three attempts: the only answer in the question that assumes you already own the hardware. Its citations backed that up — garmin.com plus sleepcycle.com, the Sleep as Android site and Reddit — and it named Pillow and AutoSleep for the watch-less.
- First choice
- Garmin Connect · Garmin Connect · Garmin Connect
- Also named
- Sleep as Android, Sleep Cycle, Pillow, AutoSleep
- Read
- sleep-as-android.github.io, sleepcycle.com, reddit.com, garmin.com
What the record shows
The first split of the round. ChatGPT and Gemini put Sleep Cycle first; Claude went with Sleep as Android; Perplexity, which leans on current search results, picked Garmin Connect — the only answer that ties the recommendation to a hardware ecosystem. No product reached three assistants, so the question records no consensus.
The alternatives were the other three first picks: Sleep Cycle (the phone-on-the-mattress standard, twice), Sleep as Android (the Android power-user pick), Garmin Connect (the hardware answer). Pillow and AutoSleep orbited as the watch-native options. The split wasn't about quality — no answer claimed any of them was bad — it was about what the assistant assumed you were holding: a phone, an Android, or a watch.
Why they split
Unlike the nutrition questions, there is no measurement evidence for the assistants to share. No pre-print puts one sleep tracker's staging accuracy against a polysomnograph in a way the answers could cite, so they fell back on feature comparisons, app-store ratings and Reddit threads — sources that disagree with each other. The assistants also weight differently: phone-only users got Sleep Cycle or Sleep as Android; watch owners got told their watch already does the job.
This is what the round looks like when nobody can measure the category. Ask two assistants about sleep apps and you can get two different answers; ask about calorie apps and you do not.
What the assistants read
Every source cited across the twelve answers: