Comparison

The Sleep Project vs Sleep Efficiency Tracker

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

Head to head
About

The Sleep Project

This app enhances your sleep through educational content and evidence-based tools. It offers structured programs for various sleep challenges, from insomnia to infant sleep, and is designed for participants of specific online coaching programs.

Highlights
  • Free educational content
  • Evidence-based sleep tools
  • Structured sleep improvement programs
  • Tailored solutions for individual needs
  • Programs for insomnia relief
  • Infant sleep support
  • Sleep for peak performance
Features
Read full description

The Sleep Project app is an education-only sleep resource for adults, parents and carers. Created by our clinician-led team, it brings together practical, evidence-based tools to help you better understand sleep and build healthier habits. Inside the app: Adult Sleep Resources: videos, breathwork, meditations, yoga nidra, noise tracks, routines and practical sleep tools Baby & Child Sleep Resources: videos and guides on naps, regressions, teething, trapped wind, feeding and common sleep challenges Sleep Stories Blog: articles on insomnia, jet lag, menopause and sleep, infant sleep, circadian health, clock changes and more Check Your Sleep Symptoms: a short educational quiz to help you reflect on your sleep and receive general guidance and signposting Available in English and Spanish. Important: This app is for educational purposes only. It is not a medical device and does not diagnose, treat, cure, monitor or prevent any condition. It does not replace advice from a doctor or qualified healthcare professional. Always seek professional advice for medical concerns or before making significant changes to your sleep or health.

About

Sleep Efficiency Tracker

Improve sleep quality and combat insomnia using CBT-I principles. This tool helps track and optimize sleep patterns by calculating a sleep efficiency score for better rest.

Highlights
  • Track sleep patterns
  • Calculate sleep efficiency score
  • Combat insomnia
  • Based on CBT-I principles
  • Improve sleep quality
  • Gain insights for better rest
Features
Read full description

Improve your sleep quality and combat insomnia with the Sleep Efficiency Calculator. This simple tool, based on Cognitive Behavioral Therapy for Insomnia (CBT-I) principles, helps you track and optimize your sleep patterns. Calculate your sleep efficiency score, a key metric in assessing sleep quality, and gain insights to improve your rest. Whether you're dealing with occasional sleep issues or chronic insomnia, our app provides the data and guidance you need for better sleep.

Screenshots

The Sleep Project3 screens
Sleep Efficiency Tracker2 screens

Verdict

The call

The clearest difference is update cadence: Sleep Efficiency Tracker at daily against The Sleep Project's every 2 months. Sleep Efficiency Tracker also leads on iOS requirement (13.4 vs 15.1). On price, ads, in-app purchases and monetization model 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

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

The Sleep Project ships an update every 2 months, Sleep Efficiency Tracker daily. The most recent releases landed on October 13, 2026 and October 6, 2026 respectively.

Scorecard2 real differences · 8 level
The Sleep Project versus Sleep Efficiency Tracker: the parameters behind the verdict, then further details
ParameterThe Sleep ProjectSleep Efficiency Tracker
PriceFreeFree
Rating—5.0 (1 ratings) — better
Positive reviews100.0% of reviews—
Number of ratings—1 — better
Update frequencyEvery 2 monthsDaily — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS15.113.4 — better
Further details — not scored
Size22 MB19 MB
Age rating4+4+
DeveloperThe Sleep Project LimitedSebastian Smith

In-app purchases

None

The Sleep Project

No in-app purchases

None

Sleep Efficiency Tracker

No in-app purchases

Questions

Is The Sleep Project free?
The Sleep Project is free to download, with no in-app purchases.
Is Sleep Efficiency Tracker free?
Sleep Efficiency Tracker is free to download, with no in-app purchases.
Do The Sleep Project or Sleep Efficiency Tracker have ads?
Neither The Sleep Project nor Sleep Efficiency Tracker shows ads.
Which is updated more often, The Sleep Project or Sleep Efficiency Tracker?
The Sleep Project ships an update every 2 months, and Sleep Efficiency Tracker daily. Most recently, The Sleep Project was updated on October 13, 2026 and Sleep Efficiency Tracker on October 6, 2026.

Other comparisons