Comparison

Hayley vs Stimly

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Hayley

Features
Read full description

Speak for sixty seconds. Hayley reflects back what you're really saying, the insight, the pattern, the question you haven't let yourself ask. Not a chatbot. Not voice notes. Not therapy. A thinking companion that pays close attention, session after session. How it works Tap. Talk. No prompts, no structure. Just say what's on your mind for up to sixty seconds. Hayley reflects back three things: — An insight: what you're really saying underneath what you said — A pattern: what keeps recurring across your sessions — A question: one worth sitting with Over time, Hayley builds a picture of how you think. The language you reach for under pressure. What you consistently sidestep. The gap between what you say and what you mean. Once a month, Hayley surfaces a reflection: what slowed you, what you avoided, one concrete next step. Who it's for Founders, makers, and overthinkers, people who process by talking but don't always have somewhere to put it. People who journal inconsistently. People who keep circling the same thoughts without getting anywhere. Privacy first On-device transcription. Your voice never leaves your phone. Your entries are private by design, not by policy. What's included — Unlimited voice entries, up to 60 seconds each — Insight, pattern, and question after every entry — Pattern memory that builds across sessions — Monthly reflection: what slowed you, what you avoided, one next step — Entry history to watch patterns emerge over time — On-device transcription, nothing leaves your phone Free trial - 14-day free trial. Cancel anytime. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Stimly

Features
Read full description

Coffee works differently for everyone — and costs everyone different sleep. Stimly estimates when your caffeine has dropped far enough to stop getting in your way at bedtime. Most caffeine apps just count milligrams. Stimly models how caffeine actually moves through your body — using a science-backed metabolism engine calibrated to your age, weight, sensitivity and habits. YOUR DAY AT A GLANCE • Live caffeine level — a real-time curve of what's active in your system now • Drinking now — log slow sips (yerba mate, big lattes) and watch absorption live • Sleep forecast — see when your body will be ready for quality sleep • Smart advice — gentle nudges when one more espresso would cost you tonight TRACK WITHOUT FRICTION • One-tap logging from your personal drinks library • Barcode scanner for bottled drinks • Daily limit with a clear budget bar (including a lower preset during pregnancy) • Symptom journal — connect how you feel to what you drank • 7-day history of everything you've logged STIMLY PRO — OPTIONAL PAID UPGRADE Everything above is free. These extras require Stimly Pro: • Tolerance tracking — see habituation build and fade week to week • Expert mode — brew method and dry mass for precision logging • Extended history — month and 90-day views • 30-day wellness export — a clean PDF of your patterns SUBSCRIPTION OR ONE-TIME PURCHASE You can get Stimly Pro in two ways: • A monthly subscription that renews automatically. • Open-ended access: one payment, no renewals, no free trial. It lasts as long as we run the Stimly service. If we end the service within 36 months of your purchase, we refund at least a proportional part of the price. See the Terms for details. Your local price is shown in the app before you buy. Payment is charged to your Apple Account at confirmation. The subscription renews automatically unless cancelled at least 24 hours before the end of the current period — manage or cancel any time in your Apple Account settings. Buying open-ended access does not cancel an active subscription. PRIVATE BY DESIGN Your data stays yours. No ads, no tracking across apps, no data selling. Stimly is a wellness tool for healthy adults. It is not a medical device and does not provide medical advice — for health concerns, talk to your doctor. Terms: https://stimly.app/terms Ā· Privacy: https://stimly.app/privacy

Screenshots

Hayley4 screens
Stimly4 screens

Verdict

The call

The clearest difference is iOS requirement: Stimly at 17.0 against Hayley's 26.4. On price, update cadence, ads and in-app purchases there is nothing between them.

Scored on Price Ā· Rating Ā· Positive reviews Ā· Number of ratings Ā· Update frequency Ā· Ads Ā· In-app purchases Ā· Monetization Ā· Best chart rank Ā· Devices Ā· Requires iOS

CostPrice Ā· In-app purchases Ā· Ads Ā· Monetization

Both are free to download. Hayley sells 2 in-app purchases, starting at $4.99 per month and Stimly sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Hayley ships an update weekly, Stimly every 8 days. The most recent releases landed on October 9, 2026 and October 17, 2026 respectively.

Scorecard1 real difference Ā· 5 level
Hayley versus Stimly: the parameters behind the verdict, then further details
ParameterHayleyStimly
PriceFreeFree
Update frequencyWeekly — betterEvery 8 days
AdsNoNo
In-app purchasesYesYes
DevicesiPhoneiPhone
Requires iOS26.417.0 — better
Further details — not scored
Size1 MB57 MB
Age rating4+4+
DeveloperSIRO Social LtdZen Media Mateusz Stys

In-app purchases

2 purchases

Hayley

Subscriptions2
  • Hayley Monthly14 Days trial$4.991 Month
  • Hayley Annual$44.991 Year
2 purchases

Stimly

Subscriptions2
  • Stimly Pro Monthly$4.991 Month
  • Stimly Pro Yearly$39.991 Year

Questions

Is Hayley free?
Hayley is free to download, with in-app purchases available.
Is Stimly free?
Stimly is free to download, with in-app purchases available.
Do Hayley or Stimly have ads?
Neither Hayley nor Stimly shows ads.
Which is updated more often, Hayley or Stimly?
Hayley ships an update weekly, and Stimly every 8 days. Most recently, Hayley was updated on October 9, 2026 and Stimly on October 17, 2026.

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