Comparison

SDM 2020 vs Mental Math

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

Head to head
About

SDM 2020

Features
Read full description

L'application SDM 2020 est destinée à être utilisée dans un établissement scolaire (école primaire ou collège) dans le cadre de la semaine des mathématiques. Elle permet la mise en place d'un concours d'énigmes, sous la supervision d'un enseignant référent qui collecte les réponses et établit un (ou plusieurs) classements. FONCTIONNEMENT : Les énigmes sont disponibles à partir du 9 mars 2020. Chaque jour, dès minuit, l'énigme quotidienne est déverrouillée et peut alors être résolue. Chaque énigme comporte trois niveaux de difficulté croissante. En général, le niveau 1 est facile et permet de saisir les manipulations à effectuer. Le niveau 3 est difficile pour des élèves de primaire, qui pourront le plus souvent résoudre le niveau 2. TRAITEMENT DES RÉPONSES : Les réponses doivent êtres transmises au(x) professeur(s) organisateur(s), mais pas à l'auteur de l'application ! La réponse à donner est sous forme d'une capture d'écran, à envoyer par mail à l'adresse indiquée dans l'organisation du concours d'énigmes. L'application ne propose pas de correction des réponses.

About

Mental Math

Sharpen your mental math skills with daily practice. This app uses spaced repetition to help you master concepts like fractions, percentages, and algebra. It offers two modes for flexible learning and provides real-life examples of how math is used every day.

Highlights
  • Spaced repetition system (SRS)
  • Covers multiplication, division, fractions, percentages, algebra
  • Zen and Chrono practice modes
  • Visible progress tracking
  • Real-life math examples
  • Home screen widgets
  • Customizable reminders
Features
Read full description

10 minutes a day to keep your mental math sharp. Whether you're in middle school, in high school, or an adult who wants to reconnect with math, Kalc helps you forge solid mental reflexes, without cramming. Spaced repetition system (SRS): concepts you master space out over time, the ones you miss come back the next day. The method known to deliver the most learning per minute practiced. WHO IT'S FOR · UK students (Year 7-10), US students (Grade 6-9) · Other English-speaking systems (Canada, Australia, Ireland, NZ) · Spanish-speaking students (Spain ESO, Mexico secundaria/preparatoria) · French-speaking students (France, Belgium, Switzerland, Quebec) · Adults who want to get back fluency with mental math Each user picks their school system during onboarding. Content and examples adapt. WHAT KALC COVERS · Multiplication and division (times tables, decimals, signed) · Fractions (simplification, operations, fraction of a whole) · Percentages (calculation, increase, discount, compound change) · Powers and square roots · Algebra and order of operations · Addition and subtraction of signed integers TWO PRACTICE MODES · Zen mode: at your own pace, no pressure, to consolidate the basics · Chrono mode: against the clock, to build speed under exam conditions VISIBLE PROGRESS Every skill has its own level and progress bar. You see exactly where you stand and what's left to master. IN REAL LIFE Every session ends with a concrete example of how this skill serves you day to day: splitting a restaurant tab, reading a paycheck, working out a discount, planning a budget. Mental math is something you actually use. HOME SCREEN WIDGETS Track your progress straight from your iOS home screen, without opening the app. Streak, XP and skills in progress at a glance. MEASURED REMINDERS Up to 5 reminders over the first 3 weeks, off at any time. No spam, no guilt-tripping. ONE-TIME PURCHASE, NO SUBSCRIPTION Kalc is free to download (1 skill available without purchase). Full access unlocks with a single purchase (lifetime or 1 year non-renewing). No traps, no hidden paywall. PRIVACY All your data stays on your device and syncs through your personal iCloud account. No ads, no advertising tracking, no cookies. Kalc is for people who want real progress in mental math. Privacy policy: https://lmtdigitalcreations.com/kalc/privacy.html Terms of use: https://lmtdigitalcreations.com/kalc/terms.html

Screenshots

SDM 20201 screens
Mental Math4 screens

Verdict

The call

The clearest difference is in-app purchases: SDM 2020 at none against Mental Math's 2. SDM 2020 also leads on iOS requirement (10.0 vs 17.6). On price, 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

Both are free to download. Mental Math sells 2 one-off in-app purchases. SDM 2020 asks for nothing beyond the download.

Scorecard2 real differences · 8 level
SDM 2020 versus Mental Math: the parameters behind the verdict, then further details
ParameterSDM 2020Mental Math
PriceFreeFree
Rating—1.0 (1 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—1 — better
Update frequency—Fortnightly
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Free with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS10.0 — better17.6
Further details — not scored
Size24 MB17 MB
Age rating4+4+
DeveloperChristophe AuclairLMT Digital Creations

In-app purchases

None

SDM 2020

No in-app purchases

2 purchases

Mental Math

One-time2
  • Plan Annuel$17.99
  • Accès à vie$29.99

Questions

Is SDM 2020 free?
SDM 2020 is free to download, with no in-app purchases.
Is Mental Math free?
Mental Math is free to download, with in-app purchases available.
Do SDM 2020 or Mental Math have ads?
Neither SDM 2020 nor Mental Math shows ads.

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