Comparison

Primal Fast vs KO Interval Timer

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

Head to head
About

Primal Fast

Features
Read full description

Primal Fast β€” The fasting tracker built for carnivore & animal-based living. Most fasting apps treat you like everyone else. Primal Fast is different β€” built from the ground up for people eating carnivore, animal-based, or keto. BUILT FOR YOUR DIET Choose your eating style during setup and get a fasting plan tailored to how you actually eat β€” not generic advice for salads and smoothies. SIMPLE, POWERFUL FASTING TIMER Pick your protocol β€” 16:8, 18:6, 20:4, OMAD, or set your own custom window. Watch your progress with a live timer that tracks your fasting stages in real time, from "Fat Burning Begins" to "Deep Ketosis." STAY MOTIVATED WITH STREAKS Build daily fasting streaks, track your longest fast, and see your weekly summary at a glance. WATER TRACKING Quick-tap water logging to stay hydrated during your fasts. REAL PROGRESS, REAL DATA Log your weight, set a target, and watch your progress bar fill up. Your weekly summary shows days fasted, average duration, and total fasting hours β€” all calculated from your real activity. SMART REMINDERS Get notified an hour before your eating window opens, and again when your fast is complete. Reminders are optional β€” you're always in control. NO HIDDEN FEES Try Primal Fast free for 7 days. We show you exactly when your trial ends and when billing starts β€” no surprises, no fine print. Whether you're doing carnivore, animal-based, keto, or just want a fasting app that doesn't feel like it was built for someone else β€” Primal Fast is for you. Download now and start your primal journey. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

KO Interval Timer

Features
Read full description

YOUR ROUNDS. YOUR PACE. KO Interval Timer is a flexible interval timer for boxing, HIIT, circuit training, stretching and anything else that works in rounds. Create your timer, choose your cues and keep a record of every sessionβ€”all in one app. BUILD A TIMER THAT FITS Set your work and rest periods, choose the number of rounds and add a preparation countdown. Give your phases custom names, save your favourite timers and duplicate them when you want to try something different. STAY FOCUSED WITH SOUND AND VOICE Choose from a range of timer sounds, spoken countdowns and coaching voices. Personalise your start, phase-change and completion cues, with optional haptic and visual alerts to help you follow each session. KEEP A WORKOUT JOURNAL Go beyond a finish time. Add notes, a photo and tags to your completed workouts. Record how you felt before and after, rate the difficulty and optionally log your bodyweight. LOOK BACK AT YOUR PROGRESS Review your workout history, completed rounds and elapsed time. Follow your training streaks and activity over time, and revisit your journal to see what worked for you. QUICK ACCESS WITH WIDGETS AND SIRI Access saved timers through home-screen widgets and use Siri shortcuts to start a session. See useful training summaries without opening your workout history. MAKE IT YOURS Choose your accent colour, preferred sounds and coaching voice. Enable the keep-screen-awake setting to keep your timer visible during a session. YOUR JOURNAL STAYS ON YOUR DEVICE Your workout history, notes and photos are stored locallyβ€”not uploaded to our servers. No KO Interval Timer account signup is required. The app does not provide cloud backup or cross-device workout syncing. IMPORTANT TO KNOW KO Interval Timer is designed for foreground use. Keep the app open and your screen awake during sessions; it does not provide background or lock-screen timer alerts. An internet connection is needed to verify subscription access. SUBSCRIPTION REQUIRED An active subscription is required to use the timer and other protected features. Available plans, prices and billing periods are displayed before purchase. Payment is charged to your Apple account when you confirm a purchase. Subscriptions renew automatically unless cancelled before renewal under Apple’s applicable terms. You can manage or cancel your subscription in your Apple account settings. Deleting the app does not cancel your subscription. Privacy Policy: https://koappstudio.com/embed/ko-interval-timer/privacy-policy Terms of Use: https://koappstudio.com/embed/ko-interval-timer/terms-of-use

Screenshots

Primal Fast3 screens
KO Interval Timer4 screens

Verdict

The call

The clearest difference is device support: Primal Fast at 3 against KO Interval Timer's 1. On price, ads, in-app purchases and iOS requirement there is nothing between them.

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

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

Both are free to download. Primal Fast sells 2 in-app purchases, starting at $6.99 per month and KO Interval Timer sells 2 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

Scorecard1 real difference Β· 5 level
Primal Fast versus KO Interval Timer: the parameters behind the verdict, then further details
ParameterPrimal FastKO Interval Timer
PriceFreeFree
Update frequencyWeeklyβ€”
AdsNoNo
In-app purchasesYesYes
DevicesiPhone, iPad, iPod β€” betteriPhone
Requires iOS15.1 β€” better16.4
Further details β€” not scored
Size43 MB74 MB
Age rating4+4+
DeveloperSERGEI JELUASVILIVAVIVA

In-app purchases

2 purchases

Primal Fast

Subscriptions2
  • Primal Fast Pro β€” Monthly$6.991 Month
  • Primal Fast Pro β€” Annual7 Days trial$34.991 Year
2 purchases

KO Interval Timer

Subscriptions2
  • English$3.991 Month
  • English$29.991 Year

Questions

Is Primal Fast free?
Primal Fast is free to download, with in-app purchases available.
Is KO Interval Timer free?
KO Interval Timer is free to download, with in-app purchases available.
Do Primal Fast or KO Interval Timer have ads?
Neither Primal Fast nor KO Interval Timer shows ads.

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