Comparison

Rereminder vs TriTab Calc

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

Head to head
About

Rereminder

Receive timely alerts before your timers expire, ensuring you're always prepared. Customize pre-alerts with specific messages and durations. Integrates with Dynamic Island and Apple Watch for seamless tracking.

Highlights
  • Pre-alerts before timer ends
  • Customizable alert timing and messages
  • Dynamic Island & Live Activity integration
  • Apple Watch support
  • Timer templates
  • Labels and colors for organization
  • Overtime tracking
Features
Read full description

Get warned before time runs out. 5 minutes before your presentation ends. 3 minutes before the meeting wraps up. 1 minute before your workout is over. Rereminder sends step-by-step alerts before your timer hits zero, so you're always prepared and never caught off guard. PRE-ALERTS — The Feature Other Timers Don't Have Most timers only alert you when time is up. Rereminder alerts you before it's up. - Set alerts at 1, 3, 5, 10, 15, or 30 minutes before end - Customize the timing to fit your needs - Add custom messages to each alert e.g., "Wrap up your slides", "Start cooldown" KEY FEATURES - Dynamic Island & Live Activity See your timer in real-time without unlocking your phone - Apple Watch Start, pause, and track timers from your wrist - Timer Templates Save your favorite setups and launch them instantly - Labels & Colors Organize timers by purpose — Presentation, Meeting, Exercise, Study - Sound & Vibration Choose the right alert style for any situation - Overtime Tracking Keep counting after the timer ends so you know how far over you went PERFECT FOR - Speakers who need to pace their presentations - Meeting hosts who respect everyone's time - Athletes managing rest intervals between sets - Students using Pomodoro with staged alerts - Coaches and mentors running timed sessions WHY "Rereminder"? re + reminder = remind you again We remind you before it's too late — again and again. No ads · No forced subscriptions · No internet required

About

TriTab Calc

Perform multiple calculations simultaneously with three independent tabs. Easily switch between calculations, track history, and copy/paste results. Ideal for managing estimates, invoices, and everyday math tasks without ads or account creation.

Highlights
  • Three independent calculator tabs
  • Calculation history
  • Copy and paste functionality
  • Dedicated tax calculation
  • Basic arithmetic and advanced functions
  • Large, clear display
  • Ad-free and no account required
Read full description

A three-tab calculator that lets you keep multiple calculations going at the same time. The A, B, and C tabs each work as an independent calculator. Switch between them without losing your current expression or result. Use A for the pre-tax price, B for the tax-inclusive total, and C for the discounted price—all without writing down intermediate numbers or clearing your work. One purchase unlocks everything. No ads, no in-app purchases, no subscriptions. ■ Three Independent Calculators Switch between A, B, and C with one tap. Each tab keeps its own expression and result, so you can work on three calculations in parallel. ■ Compare All Three See the total of all three tabs and the difference between the highest and lowest at a glance. ■ Tax In and Out Add tax with one tap, or work back from a tax-inclusive price to the pre-tax amount. Set any tax rate in Settings. ■ Split the Bill Enter a total and the number of people to get the amount per person, with optional rounding up. ■ History, Copy and Undo Each tab keeps its own history. Tap an entry to copy its result. Tap the display to copy or paste, touch and hold to clear. Undo and redo are supported. ■ Essential Calculator Functions Basic arithmetic plus square root (√), square (x²), percentages (%), sign change (±), parentheses, and a 00 key. ■ Easy on the Eyes Choose from four themes—Pastel, High contrast, Dark, and Night—and turn on Large text when you need it. ■ Four Languages English, Japanese, Simplified Chinese, and Traditional Chinese. The app follows your device language automatically. ■ Perfect For • Checking estimates and invoices • Comparing pre-tax, tax-inclusive, and discounted prices • Calculating sales tax and shopping discounts • Splitting bills and calculating per-person costs • Comparing unit prices • Adding up inventory and quantities ■ Privacy Your calculation history and settings are stored only on your device. No account is needed, and the app does not collect personal information or send your data to external servers.

Screenshots

Rereminder4 screens
TriTab Calc4 screens

Verdict

The call

The clearest difference is price: Rereminder at Free against TriTab Calc's $2.99. Rereminder also leads on rating (4.4 vs 3.7) and update cadence (every 3 days vs fortnightly). TriTab Calc's advantage is in-app purchases (none vs 2) and review sentiment (100% vs 75%). On ratings volume, 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

Rereminder is free to download; TriTab Calc costs $2.99 up front. Rereminder sells 2 one-off in-app purchases. TriTab Calc asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Rereminder holds the better App Store score, 4.4 against 3.7. Both are backed by a comparable volume of ratings — 5 and 3 respectively. Written reviews complicate that: 75% of Rereminder's written reviews are positive against 100% of TriTab Calc's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Rereminder ships an update every 3 days, TriTab Calc fortnightly. The most recent releases landed on October 26, 2026 and October 24, 2026 respectively.

Scorecard7 real differences · 3 level
Rereminder versus TriTab Calc: the parameters behind the verdict, then further details
ParameterRereminderTriTab Calc
PriceFree — better$2.99
Rating4.4 (5 ratings) — better3.7 (3 ratings)
Positive reviews75.0% of reviews100.0% of reviews — better
Number of ratings5 — better3
Update frequencyEvery 3 days — betterFortnightly
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases — betterPaid
DevicesiPhone, Apple Watch — betteriPhone
Requires iOS26.017.6 — better
Further details — not scored
Size17 MB11 MB
Age rating4+4+
Developerhyunho leeHIROKI MURAI

Customer experience

Rereminder

All ratings5 ratings
Positive80.0%
Neutral0.0%
Negative20.0%
Written reviews4 reviews
Positive75.0%
Neutral25.0%
Negative0.0%

TriTab Calc

All ratings3 ratings
Positive66.7%
Neutral0.0%
Negative33.3%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

2 purchases

Rereminder

One-time2
  • upgrade$6.99
  • 두번알림 pro$9.99
None

TriTab Calc

No in-app purchases

Questions

Is Rereminder free?
Rereminder is free to download, with in-app purchases available.
Is TriTab Calc free?
TriTab Calc costs $2.99, with no in-app purchases.
Which has better reviews, Rereminder or TriTab Calc?
Rereminder is rated higher. Rereminder averages 4.4 out of 5 from 5 ratings, while TriTab Calc averages 3.7 from 3 ratings.
Do Rereminder or TriTab Calc have ads?
Neither Rereminder nor TriTab Calc shows ads.
Which is updated more often, Rereminder or TriTab Calc?
Rereminder ships an update every 3 days, and TriTab Calc fortnightly. Most recently, Rereminder was updated on October 26, 2026 and TriTab Calc on October 24, 2026.

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