Delta Calc vs Timer on Me
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Delta Calc
Quickly calculate percent changes, discounts, and financial gains without complex math. Solve for any of the three values in the percent change formula with an intuitive interface and fun animations.
- Calculate percent changes
- Solve for any variable in the formula
- Customizable decimal places
- Haptic feedback
- Fun animations
- Adjustable keyboard buttons
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A fast, easy, and fun-to-use percent change calculator. Now you can quickly calculate discounts, financial gains, and percent changes without having to use Excel, Google, or do the long math. Delta Calc can solve for any of the three values within the percent change formula. It solves for the a, b, or c value in the percent change formula ((b - a) / a) * 100 = c. Other features include: - Haptic feedback (can be disabled if desired) - Change the number of decimal places displayed in the result (from 0 to 10) - Fun animation when tapping the swap button (warning: could become addictive) - Delightful to tap number pad buttons - Enable and disable keyboard buttons Terms: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy: https://deltacalc.app/privacy Support: https://deltacalc.app/support
Timer on Me
This app offers a versatile multi-timer and stopwatch solution for various activities. It features dedicated interval modes for workouts, allows for numerous simultaneous timers, and provides visual progress cues. Save, share, and customize your timing sessions with ease.
- Dedicated workout interval modes (Tabata, EMOM, 30/30)
- Up to 50 independent timers and stopwatches
- Auto-repeat timers
- Visual progress bars with color cues
- Customizable timer names and reordering
- Save and share timer sessions
- Keep device on mode
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Timer on Me is the reliable multi-timer and stopwatch for iPhone, iPad, and Apple Watch. Run up to 50 independent timers at once, time interval workouts with precision, and trust that your alerts will fire — even if your phone is locked or the app is closed. ALARMS • Wake-up and reminder alarms with custom labels and weekday schedules • Powered by AlarmKit — rings even when iPhone is locked or Timer on Me is closed • Configurable snooze (3 / 5 / 9 / 15 / 30 minutes) or no snooze • Choose from bundled ringtones or import your own sounds • One-tap enable/disable from the dedicated Alarms tab WORKOUTS & INTERVALS • Built-in Tabata, EMOM, and 30/30 presets — start training in two taps • Custom interval editor with flexible minute/second pickers for work, rest, and rounds • Full-screen workout mode with phase color cues and optional sound mute • Pause, skip, and resume mid-workout without losing your place APPLE WATCH • Full native watchOS app — not a companion shell • Multiple concurrent stopwatches and timers on your wrist • Centisecond stopwatch precision • Dedicated watch complications for one-tap access • Works independently when your iPhone is out of reach 50 TIMERS AT ONCE • Run up to 50 independent timers and stopwatches in a single session • Start, stop, and reset individually or in synced groups • Auto-repeat for looping rounds • Timers continue past zero to track overtime • Visual progress bars with color cues at 50% (yellow) and 10% (red) • Drag-and-drop reordering and custom names RELIABLE ALERTS • AlarmKit: alarms ring even if iPhone is locked or Timer on Me is closed • Dynamic Island and Live Activity for glanceable progress • Home Screen widgets in Small, Medium, and Large sizes • Built-in ringtones including bells, birds, and vintage tones • Tap to preview ringtones instantly before selecting • "Keep Screen On" mode prevents dimming during long sessions CUSTOMIZE & SHARE • Toggle decimals, totals, and percentages per your workflow • Save and overwrite sessions for instant reuse • Export sessions as CSV, JSON, or Plain Text • Share timer setups with teammates, students, or clients BUILT FOR iPhone, iPad & APPLE WATCH • Adaptive layouts for all screen sizes • iPad Split View support • Available in 34 languages PERFECT FOR • HIIT, Tabata, CrossFit, and circuit training • Boxing rounds and martial arts sparring • Studying with Pomodoro and focus blocks • Cooking, baking, and multi-dish meal prep • Classroom activities and group timing • Yoga, meditation, and breathwork • Music practice and public speaking • Board games and party events Download Timer on Me and take full control of your time — at the gym, at work, or at home. Privacy Policy: https://masawata.net/privacy-policy.html Terms Of Service: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is price: Timer on Me at Free against Delta Calc's $0.99. Timer on Me also leads on ratings volume (7 vs 2). Delta Calc's advantage is rating (5.0 vs 4.4) and update cadence (every 3 days vs every 2 weeks). On ads, in-app purchases 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
Timer on Me is free to download; Delta Calc costs $0.99 up front. Delta Calc sells 3 in-app purchases, starting at $0.99 per month and Timer on Me sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
Delta Calc holds the better App Store score, 5.0 against 4.4. Both are backed by a comparable volume of ratings — 2 and 7 respectively.
Delta Calc ships an update every 3 days, Timer on Me every 2 weeks. The most recent releases landed on June 1, 2026 and September 14, 2026 respectively.
| Parameter | Delta Calc | Timer on Me |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | 5.0 (2 ratings) — better | 4.4 (7 ratings) |
| Positive reviews | — | 66.7% of reviews |
| Number of ratings | 2 | 7 — better |
| Update frequency | Every 3 days — better | Every 2 weeks |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPad | iPhone, iPad, Apple Watch — better |
| Requires iOS | 17.6 — better | 26.0 |
| Further details — not scored | ||
| Size | 2 MB | 9 MB |
| Age rating | 4+ | 9+ |
| Developer | Stephen Coffey | Weiren Hsiao |
Customer experience
Delta Calc
Timer on Me
In-app purchases
Delta Calc
- Delta Calc Monthly$0.991 Month
- Delta Calc Yearly$4.991 Year
- Delta Calc Lifetime$9.99
Timer on Me
- More Alarms$0.99









