Comparison

Probell vs Interval

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

Head to head
About

Probell

Features
Read full description

Train together. Get stronger. Probell turns training into a team sport. Plan your workouts, follow expert coach plans, and push each other to show up โ€” every single session. PLAN YOUR TRAINING Build sessions your way with the Planner. Type a workout in plain language with the Text Planner, or let the AI Planner generate a complete session for you. Supports AMRAP, EMOM, For Time, Girl & Hero WODs, ladders, supersets and more. TRAIN AS A TEAM Add your friends, train together, and stay accountable. Training is easier โ€” and a lot more fun โ€” when you're in it together. Browse ready-made workout plans from coaches in the Plan Shop and start in one tap. Coaches can build and sell their own multi-week programs with the Workout Manager. TRACK YOUR PROGRESS Log completed trainings, follow planned sessions, and watch your strength climb week after week. MEMBERSHIP Free โ€” 1 planned training per week Pro โ€” unlimited Planner, Text Planner & AI Planner Coach โ€” everything in Pro plus the Workout Manager to build and sell plans Probell Pro and Probell Coach are auto-renewable monthly subscriptions billed to your Apple ID. Your subscription renews automatically unless canceled at least 24 hours before the end of the current period. Manage or cancel anytime in your App Store settings. Privacy Policy: https://probell.app/privacy Terms of Use: https://probell.app/terms Download Probell and start training as a team โ€” today.

About

Interval

Features
Read full description

Interval is a fast, focused timer for HIIT, Tabata, EMOM, circuits, boxing rounds and any work/rest training you do. Set your work, rest and rounds โ€” or start from a ready-made preset โ€” and press start. A big, glanceable timer with color-coded phases and audio, voice and haptic cues keeps you on pace without staring at the screen. ON YOUR WRIST โ€ข A full Apple Watch app โ€” start and run any of your workouts from your wrist โ€ข Live sync โ€” start on iPhone and it opens on your Watch instantly, and the other way around โ€ข Pause, skip or end on either device and the other follows along โ€ข Haptic cues on every phase change, so you can train without looking BUILT FOR TRAINING โ€ข Work, rest and rounds you control, with round rests between sets โ€ข Tabata, HIIT and EMOM presets to start from โ€ข A clean preview of the whole workout before you begin โ€ข Gym circuits, boxing rounds, sprint intervals, stretching, physio sets โ€” anything that runs on a clock STAY LOCKED IN โ€ข A large timer with color-coded WORK / REST phases โ€ข Two-tier progress: where you are in the round and in the whole workout โ€ข Audio beeps and an optional voice cue on every phase change and the last 3 seconds โ€ข Haptic feedback so you can train heads-down โ€ข Keeps running with the screen locked and in the background LOCK SCREEN & DYNAMIC ISLAND โ€ข A Live Activity shows the current phase and countdown on the Lock Screen and in the Dynamic Island YOURS, AND PRIVATE โ€ข No account, no sign-up โ€ข No tracking, no ads, no data collection โ€” everything stays on your device SIMPLE PRICING Use Interval free for up to 15 workouts with every feature unlocked. A single one-time purchase โ€” Interval Pro โ€” removes the limit forever and unlocks accent themes. No subscription, ever. Questions or feedback? Email interval@klimakov.me

Screenshots

Probell4 screens
Interval4 screens

Verdict

The call

The clearest difference is update cadence: Probell at every 5 days against Interval's every 10 days. Probell also leads on iOS requirement (15.0 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

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

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Probell sells 9 in-app purchases, starting at $2.99 per month and Interval sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Probell ships an update every 5 days, Interval every 10 days. The most recent releases landed on October 28, 2026 and October 31, 2026 respectively.

Scorecard2 real differences ยท 4 level
Probell versus Interval: the parameters behind the verdict, then further details
ParameterProbellInterval
PriceFreeFree
Update frequencyEvery 5 days โ€” betterEvery 10 days
AdsNoNo
In-app purchasesYesYes
DevicesiPhone, iPodiPhone, Apple Watch
Requires iOS15.0 โ€” better17.0
Further details โ€” not scored
Size9 MB38 MB
Age rating12+4+
DeveloperTom GassnerOLEG KLIMAKOV

In-app purchases

9 purchases

Probell

Subscriptions2
  • Probell Pro$2.991 Month
  • Probell Coach$9.991 Month
One-time7
  • Workout Plan$0.99
  • Workout Plan$1.99
  • Workout Plan$2.99
Show 4 more
  • Restock 10$2.99
  • Workout Plan$4.99
  • Workout Plan$9.99
  • Workout Plan$14.99
1 purchases

Interval

One-time1
  • Interval Pro$6.99

Questions

Is Probell free?
Probell is free to download, with in-app purchases available.
Is Interval free?
Interval is free to download, with in-app purchases available.
Do Probell or Interval have ads?
Neither Probell nor Interval shows ads.
Which is updated more often, Probell or Interval?
Probell ships an update every 5 days, and Interval every 10 days. Most recently, Probell was updated on October 28, 2026 and Interval on October 31, 2026.

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