Comparison

One Life Diet vs Pvolve Studios

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

Head to head
About

One Life Diet

This app simplifies calorie tracking with a unique Block System, focusing on food composition rather than just calorie counts. It helps users understand the true impact of food on weight loss and makes journaling easier by assigning a single Block serving size to each food.

Highlights
  • Proprietary Block System for calorie tracking
  • Simplified food journaling with single variable serving sizes
  • Custom food creation and saving
  • Personalized favorites list
  • Exercise and water intake tracking
  • Automatic Block and weight graphing
  • Daily, weekly, and custom date journal viewing
Read full description

The One Life Diet app will transform the way you track calories. Not only will its unique and innovative system speed up your weight loss, it will also dramatically simplify the process. WHY NOT JUST COUNT CALORIES? To put it bluntly, the old-school belief that “a calorie is a calorie” is simply wrong. The reality is, carbohydrates cause you to gain weight faster than proteins or fats. When you treat all calories as equal, your weight loss is often not going to seem to make any sense – because your expectations are based on incorrect information. And if your diet is based on the belief that all calories are the same, it is going to make losing weight harder and slower than it should be. THE ONE LIFE BLOCK SYSTEM One Life’s Block System for counting calories is completely different from any other calorie counting app available. Using a proprietary system created by Jonathan Haynes, MD, the creator of THE ONE LIFE DIET, the One Life app assigns a Block count to each food based on its ratio of carbohydrates and calories to its protein, fat, and fiber content as well as the food's ability to satisfy hunger and to keep you full. The One Life Diet app allows you to accurately assess the true impact of a food on your weight, which allows you to make choices that will truly create weight loss. And when you can do that, weight loss stops feeling like a mystery and finally starts to make sense. CALORIE COUNTING MADE EASY Calorie counting is so inherently cumbersome, even with a great app it’s still a hassle. Calorie counting requires you to memorize two variables for every food: the serving size + the calorie count for that serving. One Life’s Block System greatly simplifies the process. We’ve categorized every food into one Block serving sizes, which means you only need to remember a single variable for each food – its serving size. Not to mention keeping track of 20 Blocks is a lot easier than trying to keep track of 1200 calories. WHAT CAN YOU DO WITH IT? Quickly and easily search the Block count of your food no matter where you are. Easily compare the Blocks of different foods to help you make better choices. Create and save your own custom foods to quickly access later. Make a personalized “favorites” list for quick and simple journaling. Search for “Free Foods” and “Carb-Free” options. Use the “quick add” feature to add Blocks when you don’t have time for the details. Track your daily exercise and your water intake. Automatically adds up your Blocks as you go. Tracks and automatically graphs your weight loss. Keep notes of your day to provide insight into your weight loss successes and failures. View your journal entries by the day, the week, or by custom dates. Easily print and email your food journal to others. PURPOSEFULLY LIMITED We don’t have the “3,000,000 food database” the other apps boast about. We aren’t trying to be an encyclopedia. What we want to be is a guide for the food you actually eat, and not the 2,999,000 that you don’t.

About

Pvolve Studios

Discover and book fitness classes at various studios. View schedules, manage your account, and track your reservations. Explore class offerings and find convenient locations.

Highlights
  • Book fitness classes
  • View studio locations
  • Check class schedules
  • Manage account
  • Review reservations
Features
Read full description

Download today to find and book your Pvolve classes. You can view studio locations and class schedules, review existing reservations, manage your account, and more.

Screenshots

One Life Diet4 screens
Pvolve Studios4 screens

Verdict

The call

The clearest difference is price: Pvolve Studios at Free against One Life Diet's $4.99. Pvolve Studios also leads on rating (5.0 vs 3.8) and ratings volume (1.9K vs 5). One Life Diet's advantage is device support (3 vs 1) and iOS requirement (12.0 vs 16.0). On update cadence, ads and in-app purchases 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

Pvolve Studios is free to download; One Life Diet costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Pvolve Studios holds the better App Store score, 5.0 against 3.8. That said, the two scores are not equally well evidenced: Pvolve Studios has 1.9K ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 67% of One Life Diet's written reviews are positive against 83% of Pvolve Studios's.

UpkeepUpdate frequency

One Life Diet ships an update fortnightly, Pvolve Studios every 3 weeks. The most recent releases landed on October 21, 2026 and October 25, 2026 respectively.

Scorecard7 real differences · 3 level
One Life Diet versus Pvolve Studios: the parameters behind the verdict, then further details
ParameterOne Life DietPvolve Studios
Price$4.99Free — better
Rating3.8 (5 ratings)5.0 (1.9K ratings) — better
Positive reviews66.7% of reviews83.3% of reviews — better
Number of ratings51.9K — better
Update frequencyFortnightly — betterEvery 3 weeks
AdsNoNo
In-app purchasesNoNo
MonetizationPaidAd-supported — better
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS12.0 — better16.0
Further details — not scored
Size54 MB38 MB
Age rating4+4+
DeveloperOne Life Diet IncPvolve LLC

Customer experience

One Life Diet

All ratings4 ratings
Positive50.0%
Neutral25.0%
Negative25.0%
Written reviews3 reviews
Positive66.7%
Neutral33.3%
Negative0.0%

Pvolve Studios

All ratings1,812 ratings
Positive99.2%
Neutral0.4%
Negative0.4%
Written reviews12 reviews
Positive83.3%
Neutral8.3%
Negative8.3%

In-app purchases

None

One Life Diet

No in-app purchases

None

Pvolve Studios

No in-app purchases

Questions

Is One Life Diet free?
One Life Diet costs $4.99, with no in-app purchases.
Is Pvolve Studios free?
Pvolve Studios is free to download, with no in-app purchases.
Which has better reviews, One Life Diet or Pvolve Studios?
Pvolve Studios is rated higher. One Life Diet averages 3.8 out of 5 from 5 ratings, while Pvolve Studios averages 5.0 from 1.9K ratings.
Do One Life Diet or Pvolve Studios have ads?
Neither One Life Diet nor Pvolve Studios shows ads.
Which is updated more often, One Life Diet or Pvolve Studios?
One Life Diet ships an update fortnightly, and Pvolve Studios every 3 weeks. Most recently, One Life Diet was updated on October 21, 2026 and Pvolve Studios on October 25, 2026.

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