CalCollections vs my12c
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
CalCollections
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This app allows users to organise their calculators into collections. The app uses tailored options to register the calculators and as much information possible about them. With CalCollections you can have all your calculator collections in one place.
my12c
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The financial calculator that has been on every banker's, broker's and realtor's desk since 1981 โ now on your iPhone, iPad and Mac. my12C brings the legendary 12C Voyager series financial calculator back to life with cycle-accurate emulation running the original microcode. Every keystroke, every display flicker, every RPN operation โ faithfully reproduced. WHY THE 12C NEVER WENT AWAY The 12C is the longest-lived calculator ever made, and for good reason: its time-value-of-money keys, cash-flow analysis and RPN logic solve real financial problems in a handful of keystrokes. It is still the calculator used in finance courses and licensing exams around the world. FEATURES โข Cycle-accurate emulation โ runs the original Voyager microcode, not a simulation โข Time value of money โ n, i, PV, PMT and FV, solve for any of the five โข Amortization โ interest and principal for any range of payments โข Cash-flow analysis โ NPV and IRR for up to 20 grouped cash flows โข Bonds โ price and yield to maturity on the 30/360 basis โข Depreciation โ straight-line, sum-of-the-years-digits and declining-balance โข Calendar โ days between dates and date arithmetic, actual and 30/360 โข Percentages, simple interest, odd-period compounding, statistics and linear regression โข Programmable โ up to 99 lines, with conditional tests, branching and looping โข RPN entry โ the efficient Reverse Polish Notation four-level stack โข Authentic 7-segment LCD display with all original annunciators โข Built-in self-tests, working exactly as on the original hardware BUILT FOR TODAY โข Complete Owner's Manual inside the app โ every section, worked example, cash-flow diagram, formula and program listing of the original handbook, with a linked subject index โข iCloud sync โ your calculator state follows you across devices โข Native on iPhone and Mac โ landscape optimized on iOS, resizable window on macOS โข Full keyboard support on Mac โ type numbers and operators directly, Enter on the numeric keypad works as ENTER โข Dark interface faithful to the original Voyager design
Screenshots
Verdict
The clearest difference is in-app purchases: CalCollections at none against my12c's 1. CalCollections also leads on iOS requirement (18.4 vs 26.0). my12c's advantage is update cadence (every 5 days vs every 4 weeks). On price, ads 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
Both are free to download. my12c sells 1 one-off in-app purchase. CalCollections asks for nothing beyond the download.
CalCollections ships an update every 4 weeks, my12c every 5 days. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.
| Parameter | CalCollections | my12c |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 4 weeks | Every 5 days โ better |
| Ads | No | No |
| In-app purchases | No โ better | Yes |
| Devices | iPhone, iPad | iPhone, iPad, Mac โ better |
| Requires iOS | 18.4 โ better | 26.0 |
| Further details โ not scored | ||
| Size | 2 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | The Calculator Store SLNE | Miroslav Perovic |
In-app purchases
CalCollections
No in-app purchases
my12c
- Unlock Full App$9.99









