Comparison

The Fast 800 vs Colourstart

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

Head to head
About

The Fast 800

This program offers science-based methods for weight loss and improved health through intermittent fasting and Mediterranean-style eating. It provides personalized plans, delicious recipes, guided workouts, and community support to help users achieve their health goals sustainably.

Highlights
  • Personalized meal plans
  • Intermittent fasting guidance
  • Mediterranean diet recipes
  • Guided workouts
  • Mindfulness and meditation
  • Community support
Features
Read full description

Developed by Dr Michael Mosley and independently validated by healthcare advisors, over 180,000 members have found success with our easy-to-stick-to programme. With its personalised plans using science-based methods, The Fast 800 has helped thousands achieve their goals with intermittent fasting and the highly acclaimed Mediterranean-style diet. Our Programme is the easiest, most convenient way to learn how to improve your health, with the tools to help you do it and real, delicious recipes to ensure you enjoy it. The Fast 800 is absolutely all you need to keep yourself accountable and start improving your health in a sustainable, delicious way. Via the app, you have access to: - 18 healthy, nutritionally balanced meal plans - Options for keto, vegetarian and 5:2 - A library of 1,000+ delicious recipes - Daily guided workouts - Low-impact to advanced exercise - Resistance and HIIT training guides - Pilates, yoga and stretching library - Mindfulness guides and audio meditations - Health Coach and Community support While many people join The Fast 800 to lose weight, and lose more than 6kg in 12 weeks on average, the goal of the programme is actually to improve your health. As it so happens, weight loss is a consequence of that. Over the years, members have seen significant improvements to their health, from reversing type 2 diabetes, to improving blood pressure and reducing the amount of medication they take. Finding better health shouldn't leave you feeling tired and hungry. Start your personalised programme and finally find what works for you. Join today and have your meal plan and shopping list in minutes! Consult your healthcare professional before beginning any diet or fitness regime. Any advice given is general in nature and not meant as a substitute for care by your usual health professional. For any further questions, please email us at info@thefast800.com Frequently asked questions: https://thefast800.com/frequently-asked-questions/ Privacy policy: https://thefast800.com/privacy-policy/ Terms and conditions: https://thefast800.com/programme-terms-conditions/ Medical disclaimer: https://thefast800.com/medical-disclaimer/ Membership subscriptions are available for 1, 3 and 12 months.

About

Colourstart

This app guides users through a series of questions to determine suitability for a specific hair color product. It also allows users to store test results and photos for sharing with beauty professionals.

Highlights
  • Suitability assessment via questions
  • Hair color avoidance guidance
  • Test result storage
  • Photo capture for results
  • Shareable with hair professionals
Features
Read full description

By carefully answering a simple set of questions, Colourstart Passport can help you decide if Colourstart is suitable for you to use. Your answers may also help you make an informed decision on whether you should avoid hair colour. Colourstart Passport stores the answers to your questions and also any pictures you have taken of your test result. This can be helpful to share with your hairdresser, beauty therapist or barber for future reference to avoid potentially unnecessary retesting. Colourstart Passport can be shared with any participating hair professional.

Screenshots

The Fast 8004 screens
Colourstart4 screens

Verdict

The call

The clearest difference is in-app purchases: Colourstart at none against The Fast 800's 3. Colourstart also leads on review sentiment (100% vs 68%) and update cadence (weekly vs every 6 weeks). On price, ads and device support 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. The Fast 800 sells 3 in-app purchases, starting at $39.99 per month. Colourstart asks for nothing beyond the download.

UpkeepUpdate frequency

The Fast 800 ships an update every 6 weeks, Colourstart weekly. Both last shipped on November 3, 2026.

Scorecard5 real differences · 5 level
The Fast 800 versus Colourstart: the parameters behind the verdict, then further details
ParameterThe Fast 800Colourstart
PriceFreeFree
Rating4.4 (34 ratings) — better—
Positive reviews67.8% of reviews100.0% of reviews — better
Number of ratings34 — better—
Update frequencyEvery 6 weeksWeekly — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationSubscriptionFree — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS14.012.0 — better
Further details — not scored
Size52 MB12 MB
Age rating12+17+
DeveloperThe Fast 800Trichocare Diagnostics Ltd

Customer experience

The Fast 800

All ratings33 ratings
Positive84.8%
Neutral3.0%
Negative12.1%
Written reviews143 reviews
Positive67.8%
Neutral7.7%
Negative24.5%

Colourstart

Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

The Fast 800

Reported bugs

4 issues
  • Login screen freezes
  • App crashes frequently
  • Logging out and unable to log back in
  • Compatibility issues with older devices

Requested features

4 requests
  • Add ability to add own meals
  • Improve recipe search functionality
  • Add option to exclude certain foods
  • Improve meal planning and shopping list features

Colourstart

Not enough reviews yet to summarise bugs or requests.

In-app purchases

3 purchases

The Fast 800

Subscriptions3
  • Monthly7 Days trial$39.991 Month
  • 3 Months7 Days trial$99.993 Months
  • Yearly7 Days trial$200.001 Year
None

Colourstart

No in-app purchases

Questions

Is The Fast 800 free?
The Fast 800 is free to download, with in-app purchases available.
Is Colourstart free?
Colourstart is free to download, with no in-app purchases.
Do The Fast 800 or Colourstart have ads?
Neither The Fast 800 nor Colourstart shows ads.
Which is updated more often, The Fast 800 or Colourstart?
The Fast 800 ships an update every 6 weeks, and Colourstart weekly. Most recently, The Fast 800 was updated on November 3, 2026 and Colourstart on November 3, 2026.

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