Comparison

CallTimer Premium vs Simple Calculator. +

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

Head to head
About

CallTimer Premium

This app helps you manage call durations by providing notifications at set intervals. It's ideal for users on fixed-minute calling plans and offers features like call history, one-tap dialing, and customizable alerts. It supports hands-free and headset usage.

Highlights
  • Call duration timer
  • Configurable notifications
  • Call history logging
  • One-tap dialing
  • Prefix number support
  • Customizable alerts and sounds
  • Hands-free compatibility
Features
Read full description

Before you start To help CallTimer work properly, check the following in your iPhone's Settings: • Notifications are enabled for CallTimer. • Vibration is enabled. Please note: due to iOS restrictions, the app cannot end calls automatically. About CallTimer CallTimer tracks call duration and notifies you at the time you set. It is ideal for mobile plans that include unlimited calls of up to 5, 10 or another set number of minutes per call. It is also useful for calling services that require a dialing prefix. Premium features 1. Call history Saves the history of calls made through CallTimer. Incoming calls are not recorded. 2. One-tap calling Tap a bookmarked number to make a call. To bookmark a number, swipe left on its row in the call history. 3. Dialing prefixes Add a dialing prefix of your choice. 4. Customization • Set the number of vibrations and notification sounds. • Adjust notification sound volume. • Lock the alarm and call type settings. • Automatically clear the number after a call ends. • Choose the screen shown when the app opens. 5. Handy shortcut Press and hold the delete button in the phone number field to clear the entire number. 6. Hands-free support Supports calls using earphones and hands-free devices.

About

Simple Calculator. +

This app offers a straightforward and dependable calculator for iPhone and iPad. It includes advanced features like tax calculation, cost/selling price/margin calculations, and memory operations. A free version is available to try before purchasing.

Highlights
  • 12-digit display
  • Tax calculation
  • Cost, selling price, and gross margin calculations
  • Memory operations
  • Grand total (GT)
  • Percentage calculation
Features
Read full description

Simple, reliable, and easy-to-use calculator app for iPhone/ iPad. If you would like to try out the calculator first, download the FREE version of the app from the developer profile. Calculator features:- * 12 digits * Tax calculation * Percentage (%) * Cost/ selling price/ gross margin calculations * Memory operations * Grand total (GT) * Square root * +/- (Sign change) * Arithmetic constant calculation * Digit grouping and decimal mark as per device locale

Screenshots

CallTimer Premium4 screens
Simple Calculator. +4 screens

Verdict

The call

The clearest difference is update cadence: CallTimer Premium at fortnightly against Simple Calculator. +'s every 3 months. Simple Calculator. +'s advantage is review sentiment (73% vs 60%) and price ($1.99 vs $3.99). On ads, in-app purchases, device support and iOS requirement 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

CallTimer Premium costs $3.99 and Simple Calculator. + $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

CallTimer Premium ships an update fortnightly, Simple Calculator. + every 3 months. The most recent releases landed on October 24, 2026 and October 26, 2026 respectively.

Scorecard4 real differences · 6 level
CallTimer Premium versus Simple Calculator. +: the parameters behind the verdict, then further details
ParameterCallTimer PremiumSimple Calculator. +
Price$3.99$1.99 — better
Rating—4.7 (147 ratings) — better
Positive reviews60.4% of reviews72.7% of reviews — better
Number of ratings—147 — better
Update frequencyFortnightly — betterEvery 3 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree with in-app purchases — better
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS15.0 — better15.6
Further details — not scored
Size6 MB1 MB
Age rating4+4+
DeveloperChunxu Qiutasser gyati

Customer experience

CallTimer Premium

Written reviews53 reviews
Positive60.4%
Neutral17.0%
Negative22.6%

Simple Calculator. +

All ratings147 ratings
Positive93.9%
Neutral2.7%
Negative3.4%
Written reviews44 reviews
Positive72.7%
Neutral11.4%
Negative15.9%

In-app purchases

None

CallTimer Premium

No in-app purchases

None

Simple Calculator. +

No in-app purchases

Questions

Is CallTimer Premium free?
CallTimer Premium costs $3.99, with no in-app purchases.
Is Simple Calculator. + free?
Simple Calculator. + costs $1.99, with no in-app purchases.
Do CallTimer Premium or Simple Calculator. + have ads?
Neither CallTimer Premium nor Simple Calculator. + shows ads.
Which is updated more often, CallTimer Premium or Simple Calculator. +?
CallTimer Premium ships an update fortnightly, and Simple Calculator. + every 3 months. Most recently, CallTimer Premium was updated on October 24, 2026 and Simple Calculator. + on October 26, 2026.

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