Comparison

WorryTree vs SLEEP SYNTH

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

Head to head
About

WorryTree

This app helps you manage overthinking and anxiety by guiding you to write down your worries, assess their solvability, and take action or let them go. It incorporates CBT and ACT techniques, offering journaling, sensory practices, and reminders to promote mental well-being.

Highlights
  • Write down worries
  • Assess solvability
  • Create action plans
  • Practice letting go
  • Identify thinking traps
  • Gratitude and acceptance journals
  • Sensory practices for calm
Features
Read full description

Overthinking? Worry on a loop? WorryTree helps you write the worry down, check whether you can do anything about it, and then act on it or let it go. Formerly Luma: same app, same account, same tools. Named best CBT app by Marie Claire (2023). HOW IT WORKS • Write it down: get the worry out of your head and into words. • Run it through the worry tree: can you do something about this? • Yes: make a short plan and choose one step to start with. • No: let it go for now, with a walk, some music or a short sensory practice. • Look back: see which worries actually happened, and what helped before. ALSO IN WORRYTREE • Notice thinking traps: check a thought against 8 common thinking styles • Gratitude, acceptance and uncertainty journals • Short sensory practices for in-the-moment calm • Worry time reminders • Works across your devices BUILT ON CBT AND ACT The worry tree is a widely used technique from cognitive behavioral therapy (CBT). WorryTree also draws on acceptance and commitment therapy (ACT). Many people use it alongside therapy, and many reviewers say a therapist or CBT course recommended it. "The absolute best app out there for managing your thoughts and worries." App Store review FULL ACCESS Full access to WorryTree needs a monthly or yearly subscription. Eligible new subscribers can start with a free trial. Prices vary by region and are shown in the app before you subscribe. Payment is charged to your Apple Account when you confirm your purchase. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period. You can manage or cancel your subscription at any time in your Apple Account settings. Terms of Service: https://www.myluma.app/terms-of-service Privacy Policy: https://www.myluma.app/privacy-policy PLEASE NOTE WorryTree is a self-help tool. It is not a substitute for professional mental health care, therapy or medical advice, and it does not diagnose or treat any condition. If you're worried about your mental health, speak to your doctor or a trained therapist. If you're in crisis, call or text 988 (US) or call 911.

About

SLEEP SYNTH

This app uses science-backed sound and light therapy to improve sleep, focus, and emotional balance. It offers targeted audio sessions for deep rest, cognitive clarity, ADHD support, and stress relief.

Highlights
  • Science-backed sound therapy
  • Light therapy integration
  • Deep sleep enhancement
  • Cognitive clarity improvement
  • ADHD focus and calm
  • Anxiety and stress relief
  • Mood and emotional balance
Features
Read full description

SleepSynth is a powerful sleep sound app that combines science-backed sound and light therapy to help you sleep better, focus longer, and feel more balanced. With targeted audio sessions designed to influence mental and physical states, SleepSynth can support: Deep, restful sleep Memory and cognitive clarity ADHD focus and calm Anxiety and stress relief Mood and emotional balance Meditation and mindfulness Whether you're winding down at night or sharpening your focus during the day, SleepSynth helps you tune in and optimize your mind naturally.

Screenshots

WorryTree4 screens
SLEEP SYNTH2 screens

Verdict

The call

The clearest difference is price: WorryTree at Free against SLEEP SYNTH's $1.99. WorryTree also leads on update cadence (every 2 weeks vs every 8 months) and device support (3 vs 1). SLEEP SYNTH's advantage is in-app purchases (none vs 10) and rating (5.0 vs 4.6). On ads there is nothing between them.

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

CostPrice · In-app purchases · Ads · Monetization

WorryTree is free to download; SLEEP SYNTH costs $1.99 up front. WorryTree sells 8 in-app purchases, starting at $1.99 per month. SLEEP SYNTH asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

SLEEP SYNTH holds the better App Store score, 5.0 against 4.6. Both are backed by a comparable volume of ratings — 10 and 3 respectively. Written reviews point the same way: 83% of WorryTree's written reviews are positive against 100% of SLEEP SYNTH's.

UpkeepUpdate frequency

WorryTree ships an update every 2 weeks, SLEEP SYNTH every 8 months. The most recent releases landed on November 2, 2026 and October 30, 2026 respectively.

Scorecard9 real differences · 1 level
WorryTree versus SLEEP SYNTH: the parameters behind the verdict, then further details
ParameterWorryTreeSLEEP SYNTH
PriceFree — better$1.99
Rating4.6 (10 ratings)5.0 (3 ratings) — better
Positive reviews82.5% of reviews100.0% of reviews — better
Number of ratings10 — better3
Update frequencyEvery 2 weeks — betterEvery 8 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationSubscriptionPaid — better
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.6 — better17.6
Further details — not scored
Size60 MB82 MB
Age rating4+12+
DeveloperCalverra Holdings LLCAndrew Nunez

Customer experience

WorryTree

All ratings9 ratings
Positive88.9%
Neutral11.1%
Negative0.0%
Written reviews40 reviews
Positive82.5%
Neutral7.5%
Negative10.0%

SLEEP SYNTH

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

8 purchases

WorryTree

Subscriptions8
  • WorryTree Plus7 Days trial$1.991 Month
  • WorryTree Plus Monthly7 Days trial2 variants$3.991 Month
  • WorryTree Plus Monthly7 Days trial2 variants$5.991 Month
Show 5 more
  • WorryTree Plus7 Days trial$19.991 Year
  • WorryTree Plus Yearly7 Days trial$24.991 Year
  • WorryTree Plus Yearly7 Days trial$39.991 Year
  • WorryTree Plus Yearly7 Days trial$59.991 Year
  • WorryTree Plus Yearly7 Days trial$69.991 Year
None

SLEEP SYNTH

No in-app purchases

Questions

Is WorryTree free?
WorryTree is free to download, with in-app purchases available.
Is SLEEP SYNTH free?
SLEEP SYNTH costs $1.99, with no in-app purchases.
Which has better reviews, WorryTree or SLEEP SYNTH?
SLEEP SYNTH is rated higher. WorryTree averages 4.6 out of 5 from 10 ratings, while SLEEP SYNTH averages 5.0 from 3 ratings.
Do WorryTree or SLEEP SYNTH have ads?
Neither WorryTree nor SLEEP SYNTH shows ads.
Which is updated more often, WorryTree or SLEEP SYNTH?
WorryTree ships an update every 2 weeks, and SLEEP SYNTH every 8 months. Most recently, WorryTree was updated on November 2, 2026 and SLEEP SYNTH on October 30, 2026.

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