Scientific Calculator Plus 991
NCalc & CalcES Calculator 115
How much does Scientific Calculator Plus 991 cost?
Prices are current as of 28 Sept 2026.
2 subscriptions from $1.99
In the United States, Scientific Calculator Plus 991 has 2 subscriptions priced $1.99 – 3.99.
| Subscription | Period | Price |
|---|---|---|
| Calculator month subscription | Monthly | $1.99 |
| Calculator yearly subscription | Annual | $3.99 |
2 one-time purchases from $5.99
In the United States, Scientific Calculator Plus 991 has 2 one-time purchases priced $5.99.
| Product | Price |
|---|---|
| Calculator Premium | $5.99 |
| Calculator Pro | $5.99 |
See what Scientific Calculator Plus 991 costs in all 175 countries →
10+ alternatives to Scientific Calculator Plus 991
| Scientific Calculator Plus 991 |   Dicamon - Giải Toán Lý Hóa Anh |   Symbolab - AI Math Solver App |   Graphing Calculator X84 |   K12Online |   VietJack - Học Online #1 |   Onluyen |   Taculator 84 Graphing Calc |   GeoGebra Graphing Calculator |   Scientific Calculator fx-991 |   GeoGebra Calculator Suite | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Rating / 5 | 4.7 | 4.6 | 4.6 | 4.5 | 1.5 | 4.4 | 3.7 | 4.4 | 4.1 | 4.7 | 4.1 |
| Reviews | 207K | 89K | 65K | 54K | 27K | 17K | 13K | 12K | 7.3K | 7.2K | 2.3K |
| Released | 2019 | 2020 | 2014 | 2018 | 2020 | 2019 | 2020 | 2019 | 2016 | 2023 | 2020 |
| Monthly price | $1.99 | $0.99 | $7.99 | — | — | — | $4.49 | $3.99 | — | $1.99 | — |
| 6-month price | — | $4.99 | $24.99 | — | — | — | $21.99 | — | — | $2.49 | — |
| Annual price | $3.99 | $7.99 | $34.99 | — | — | — | $39.99 | $14.99 | — | $7.99 | — |
| One-time price | $5.99 | $0.99 | $7.99 | $5.99 | — | — | — | $7.99 | — | $0.99 | — |
The going rate for each plan in United States, in its own currency, shaded from the cheapest price on the row to the dearest. Plans fewer than four in ten of the priced apps sell are left out.
Scientific Calculator Plus 991 reviews
4.7 out of 5, based on 207,083 reviews.
What people like
- Feels just like a real Casio
- Handles very large numbers well
- Great for STEM work
- Very powerful and in-depth
What they complain about
- Ads interrupt you constantly
- Inappropriate ads appear often
- Some features require payment
- Calculations can be wrong
Like it!
It has awesome features!
Hay
1 sao là của Việt Nam 5 sao của Trung Quốc nên 1 sao thôi
It’s good, but there needs to be a fix.
The “*10^n” part beyond 10^10^20 needs to be inside the exponent, not outside.
Gửi nhà sản xuất
Tạm
Do i need to pay?
It says “Free Trial” Do i really need to pay?
calc
good
clm đcmmm
máy tính k như máy tính,bắt đăng kí gói vip
Đánh giá
Khá ổn nhg 1 số tính năng cần pre
خيبة امل
بعد ما اعتمد عليه ٤ سنوات في الحسابات اليوم حذفته بسبب الإعلانات الوسخه الي فيه .
limit gets wrong result “Indeterminate”
limit of (1/x-1/(e^x-1)) should get 1/2 when x approaches 0, not “Indeterminate”.
Great
Works great
ads
i’m seeing half naked girls as ads like wtf
Calculator
It’s a very in depth calculator app. I just wish they had a dark icon to match with iOS
Minimize options
I can’t change the size of the calculator in the screen
Bad ads
I use this app on my iPad, and it's the best calculator app. However, when I use it on my iPhone, I get very inappropriate ads. This prevents me from using the app in public places. Please find a solution.
Fantastic calculator
I’m a retired mathematician and I’ve made “calculators” one of my retirement hobbies; physical calculators and calculator apps. I’ve examined and experimented with over 50 calculator apps on the iPhone, but I only keep two on my home page for my personal use. This is one of them. I’m really impressed with the capabilities of this calculator, and I’m still exploring what it can do. I highly recommend it for anyone doing STEM work.
khó chịu
tiếng quá to
Nhận xeis
Cũng được
重复扣费
为什么 iPad 端买断后，iPhone 端不能用呢，需要重新购买？账户不是通用的吗？
not bad
its wasnt the best experience , there is better , plus i have to pay to use extra features that i need in maths
Reaching crazy numbers
I can reach 10^10^500 and higher!
Học
Như c
Good
All others trash so this good
tệ
không hiểu sao app cập nhập xong lại rất khó dùng, nhất là vẽ đồ thị
GOOD OPTION
Can't find feet - inches - etc.
Best scientific calculator app yet. Pleasing design.
Aaa
Chim to không sợ điểm kém
Wow
Great calculator program across devices
I am using NCalc for many years now. It does most of the calculations I need on a daily bass, and units conversion as well. I have it on MAC, iPad, iPhone. It is worth spending some money to get a first class product.
How can it be so slow?
Love the functionality but even simple addition takes 1-2 seconds. Super annoying. How can the cheap standalone calculator do this instantly when this app on an iPhone struggles?
Mal traducido
Pongo español y hay muchas cosas en portugués e inglés
Great Calculator!
This is my goto calculator for everything. So far it’s handled everything I’ve thrown at it. You won’t regret getting this one at all.
Calculator
Calculaters
Love for Math
I love this tool it helps me be more efficient
还可以
软件整体来说不错。但很抱歉给你差评，我想让你注意到这条评论，小于等于号无法使用，会变成小于号。
Ads
Ads are to much I can’t work smoothly
Very useful tool
Basically the same as the physical Casio calculator!
Really bad
I kept putting in the SAME calculation and it kept coming out with a different number to all my friends Casio calculators. Made me lose marks on my exam for incorrect calculations. Not happy
Good
good
لانه ليسة بالمجانا
لانه ليسة بالمجانا
منور م jnmiiiinn I is
You j kiss
This limit is infinity
The calc i needed
wierd background noise
App is making irritating background noise while on
I love this, but.
I enjoyed having this, but I was having trouble with one issue. I wasn't able to access one of the websites, as it said “Forbidden.” I had to pause the VPN to access the website. I had the same issue with the other VPN; however, I didn't think this would encounter the same problem.
Not worth it
It’s a good option to have, but to have so many ads including an overpriced subscription when it’s built on top of a FOSS library is just a bit scummy.
No hyperbolic functions
Ive looked and looked but I am frustrated not t find hyperbolic functions. No Sinh, no Cosh, no Tanh. Also there are no Secnt and Cosecant..
haaaaaa
this calculator is the best!
App máy tính
Như cạk
Best App for Studying
Yes
Date history is wrong
Date history is wrong please fix problems
Scientific Calculator Plus 991 price by country
A monthly subscription costs $1.13 in Nigeria and $3.11 in Hungary — 3× more for the same thing. Below is the going rate for each plan in every country that sells it — the middle price of what the app charges there, in the country's own currency with the dollar equivalent beneath it.
| Country | Monthly | Annual | One-time |
|---|---|---|---|
| Afghanistan | $1.99 | $3.99 | $5.99 |
| Albania | $1.99 | $4.99 | $6.99 |
| Algeria | $1.99 | $3.99 | $5.99 |
| Angola | $1.99 | $3.99 | $5.99 |
| Anguilla | $1.99 | $3.99 | $5.99 |
| Antigua And Barbuda | $1.99 | $3.99 | $5.99 |
| Argentina | $1.99 | $3.99 | $5.99 |
| Armenia | $1.99 | $4.99 | $6.99 |
| Australia | A$2.99$2.09 | A$5.99$4.19 | A$9.99$6.99 |
| Austria | €1.99$2.31 | €3.99$4.63 | €6.99$8.12 |
| Azerbaijan | $1.99 | $3.99 | $6.99 |
| Bahamas | $1.99 | $3.99 | $6.99 |
| Bahrain | $1.99 | $3.99 | $6.99 |
| Barbados | $1.99 | $4.99 | $6.99 |
| Belarus | $1.99 | $4.99 | $6.99 |
| Belgium | €1.99$2.27 | €3.99$4.54 | €6.99$7.96 |
| Belize | $1.99 | $3.99 | $5.99 |
| Benin | $1.99 | $3.99 | $6.99 |
| Bermuda | $1.99 | $3.99 | $5.99 |
| Bhutan | $1.99 | $3.99 | $5.99 |
| Bolivia | $1.99 | $3.99 | $5.99 |
| Bosnia & Herzegovina | €1.99$2.27 | €3.99$4.54 | €6.99$7.96 |
| Botswana | $1.99 | $3.99 | $5.99 |
| Brazil | R$9.90$1.91 | R$19.90$3.83 | R$39.90$7.69 |
| British Virgin Islands | $1.99 | $3.99 | $5.99 |
| Brunei Darussalam | $1.99 | $3.99 | $5.99 |
| Bulgaria | €1.99$2.27 | €4.49$5.11 | €6.99$7.96 |
| Burkina Faso | $1.99 | $3.99 | $5.99 |
| Cambodia | $1.99 | $3.99 | $6.99 |
| Cameroon | $1.99 | $4.99 | $6.99 |
| Canada | CA$2.99$2.12 | CA$4.99$3.54 | CA$7.99$5.67 |
| Cape Verde | $1.99 | $3.99 | $5.99 |
| Cayman Islands | $1.99 | $3.99 | $5.99 |
| Chad | $1.99 | $3.99 | $5.99 |
| Chile | CLP 1,990$2.07 | CLP 3,990$4.15 | CLP 6,990$7.26 |
| China | CN¥15.00$2.23 | CN¥28.00$4.17 | CN¥38.00$5.65 |
| Colombia | COP 9,900$2.97 | COP 24,900$7.47 | COP 29,900$8.97 |
| Congo | $1.99 | $3.99 | $6.99 |
| Congo, Democratic Republic | $1.99 | $3.99 | $5.99 |
| Costa Rica | $1.99 | $3.99 | $5.99 |
| Cote Divoire | $1.99 | $3.99 | $6.99 |
| Croatia | €1.99$2.27 | €3.99$4.54 | €6.99$7.96 |
| Cyprus | €1.99$2.27 | €3.99$4.54 | €6.99$7.96 |
| Czech Republic | CZK 49.00$2.36 | CZK 99.00$4.76 | CZK 149.00$7.16 |
| Denmark | DKK 19.00$2.90 | DKK 39.00$5.95 | DKK 49.00$7.47 |
| Dominica | $1.99 | $3.99 | $5.99 |
| Dominican Republic | $1.99 | $3.99 | $5.99 |
| Ecuador | $1.99 | $3.99 | $5.99 |
| Egypt | EGP 69.99$1.35 | EGP 149.99$2.90 | EGP 299.99$5.80 |
| El Salvador | $1.99 | $3.99 | $5.99 |
| Estonia | €1.99$2.27 | €3.99$4.54 | €6.99$7.96 |
| Fiji | $1.99 | $3.99 | $5.99 |
| Finland | €1.99$2.27 | €3.99$4.54 | €6.99$7.96 |
| France | €1.99$2.27 | €3.99$4.54 | €6.99$7.96 |
| Gabon | $1.99 | $3.99 | $5.99 |
| Gambia | $1.99 | $3.99 | $5.99 |
| Georgia | $1.99 | $4.99 | $6.99 |
| Germany | €1.99$2.27 | €3.99$4.54 | €6.99$7.96 |
| Ghana | $1.99 | $4.99 | $6.99 |
| Greece | €1.99$2.27 | €3.99$4.54 | €6.99$7.96 |
| Grenada | $1.99 | $3.99 | $5.99 |
| Guatemala | $1.99 | $3.99 | $5.99 |
| Guinea-bissau | $1.99 | $3.99 | $5.99 |
| Guyana | $1.99 | $3.99 | $5.99 |
| Honduras | $1.99 | $3.99 | $5.99 |
| Hong Kong | HK$18.00$2.30 | HK$32.00$4.08 | HK$48.00$6.12 |
| Hungary | HUF 999$3.11 | HUF 1,790$5.58 | HUF 2,490$7.76 |
| Iceland | $1.99 | $4.99 | $6.99 |
| India | ₹199.00$2.07 | ₹399.00$4.16 | ₹599.00$6.24 |
| Indonesia | IDR 29,000$1.62 | IDR 69,000$3.85 | IDR 119,000$6.64 |
| Iraq | $1.99 | $3.99 | $5.99 |
| Ireland | €1.99$2.27 | €3.99$4.54 | €6.99$7.96 |
| Israel | ₪7.90$2.59 | ₪14.90$4.89 | ₪19.90$6.52 |
| Italy | €1.99$2.27 | €3.99$4.54 | €6.99$7.96 |
| Jamaica | $1.99 | $3.99 | $5.99 |
| Japan | ¥300$1.90 | ¥600$3.81 | ¥1,000$6.35 |
| Jordan | $1.99 | $3.99 | $5.99 |
| Kazakhstan | KZT 999.00$2.26 | KZT 1,990.00$4.50 | KZT 3,490.00$7.88 |
| Kenya | $1.99 | $4.99 | $6.99 |
| Kosovo | €1.99$2.27 | €3.99$4.54 | €6.99$7.96 |
| Kuwait | $1.99 | $3.99 | $5.99 |
| Kyrgyzstan | $1.99 | $3.99 | $6.99 |
| Lao Peoples Democratic Republic | $1.99 | $3.99 | $6.99 |
| Latvia | €1.99$2.27 | €3.99$4.54 | €6.99$7.96 |
| Lebanon | $1.99 | $3.99 | $5.99 |
| Liberia | $1.99 | $3.99 | $5.99 |
| Libya | $1.99 | $3.99 | $5.99 |
| Lithuania | €1.99$2.27 | €3.99$4.54 | €6.99$7.96 |
| Luxembourg | €1.99$2.27 | €3.99$4.54 | €6.99$7.96 |
| Macao | $1.99 | $3.99 | $5.99 |
| Macedonia | $1.99 | $3.99 | $5.99 |
| Madagascar | $1.99 | $3.99 | $5.99 |
| Malawi | $1.99 | $3.99 | $5.99 |
| Malaysia | MYR 9.90$2.43 | MYR 19.90$4.89 | MYR 29.90$7.35 |
| Maldives | $1.99 | $3.99 | $5.99 |
| Mali | $1.99 | $3.99 | $5.99 |
| Malta | €1.99$2.27 | €3.99$4.54 | €6.99$7.96 |
| Mauritania | $1.99 | $3.99 | $5.99 |
| Mauritius | $1.99 | $3.99 | $6.99 |
| Mexico | MX$39.00$2.20 | MX$89.00$5.02 | MX$129.00$7.27 |
| Micronesia | $1.99 | $3.99 | $5.99 |
| Moldova | $1.99 | $4.99 | $6.99 |
| Mongolia | $1.99 | $3.99 | $5.99 |
| Montenegro | €1.99$2.27 | €3.99$4.54 | €5.99$6.82 |
| Montserrat | $1.99 | $3.99 | $5.99 |
| Morocco | $1.99 | $3.99 | $6.99 |
| Mozambique | $1.99 | $3.99 | $5.99 |
| Myanmar | $1.99 | $3.99 | $5.99 |
| Namibia | $1.99 | $3.99 | $5.99 |
| Nauru | $1.99 | $3.99 | $5.99 |
| Nepal | $1.99 | $3.99 | $6.99 |
| Netherlands | €1.99$2.27 | €3.99$4.54 | €6.99$7.96 |
| New Zealand | NZ$3.99$2.25 | NZ$6.99$3.95 | NZ$9.99$5.64 |
| Nicaragua | $1.99 | $3.99 | $5.99 |
| Niger | $1.99 | $3.99 | $5.99 |
| Nigeria | NGN 1,500.00$1.13 | NGN 3,200.00$2.41 | NGN 9,900.00$7.46 |
| Norway | NOK 29.00$3.05 | NOK 49.00$5.15 | NOK 79.00$8.31 |
| Oman | $1.99 | $3.99 | $5.99 |
| Pakistan | PKR 500$1.81 | PKR 1,100$3.97 | PKR 1,700$6.14 |
| Palau | $1.99 | $3.99 | $5.99 |
| Panama | $1.99 | $3.99 | $5.99 |
| Papua New Guinea | $1.99 | $3.99 | $5.99 |
| Paraguay | $1.99 | $3.99 | $5.99 |
| Peru | PEN 7.90$2.33 | PEN 14.90$4.40 | PEN 24.90$7.35 |
| Philippines | ₱99.00$1.59 | ₱199.00$3.19 | ₱399.00$6.39 |
| Poland | PLN 9.99$2.60 | PLN 19.99$5.21 | PLN 29.99$7.81 |
| Portugal | €1.99$2.27 | €3.99$4.54 | €6.99$7.96 |
| Qatar | QAR 7.99$2.20 | QAR 14.99$4.12 | QAR 19.99$5.49 |
| Romania | RON 9.99$2.16 | RON 19.99$4.32 | RON 29.99$6.48 |
| Russia | RUB 199.00$2.31 | RUB 349.00$4.06 | RUB 499.00$5.80 |
| Rwanda | $1.99 | $3.99 | $5.99 |
| Sao Tome & Principe | $1.99 | $3.99 | $5.99 |
| Saudi Arabia | SAR 9.99$2.66 | SAR 17.99$4.80 | SAR 24.99$6.66 |
| Senegal | $1.99 | $3.99 | $6.99 |
| Serbia | €1.99$2.27 | €3.99$4.54 | €6.99$7.96 |
| Seychelles | $1.99 | $3.99 | $5.99 |
| Sierra Leone | $1.99 | $3.99 | $5.99 |
| Singapore | SGD 2.98$2.33 | SGD 5.98$4.67 | SGD 8.98$7.02 |
| Slovakia | €1.99$2.27 | €3.99$4.54 | €6.99$7.96 |
| Slovenia | €1.99$2.27 | €3.99$4.54 | €6.99$7.96 |
| Solomon Islands | $1.99 | $3.99 | $5.99 |
| South Africa | ZAR 39.99$2.45 | ZAR 79.99$4.90 | ZAR 119.99$7.35 |
| South Korea | ₩3,300$2.43 | ₩5,500$4.06 | ₩9,900$7.30 |
| Spain | €1.99$2.27 | €3.99$4.54 | €6.99$7.96 |
| Sri Lanka | $1.99 | $3.99 | $5.99 |
| St. Kitts and Nevis | $1.99 | $3.99 | $5.99 |
| St. Lucia | $1.99 | $3.99 | $5.99 |
| St. Vincent & The Grenadines | $1.99 | $3.99 | $5.99 |
| Suriname | $1.99 | $3.99 | $6.99 |
| Swaziland | $1.99 | $3.99 | $5.99 |
| Sweden | SEK 29.00$3.03 | SEK 49.00$5.12 | SEK 79.00$8.25 |
| Switzerland | CHF 2.00$2.48 | CHF 4.00$4.95 | CHF 5.00$6.19 |
| Taiwan | NT$60.00$1.89 | NT$120.00$3.78 | NT$190.00$5.98 |
| Tajikistan | $1.99 | $4.99 | $6.99 |
| Tanzania | TZS 5,900.00$2.22 | TZS 11,900.00$4.48 | TZS 17,900.00$6.74 |
| Thailand | THB 79.00$2.36 | THB 149.00$4.46 | THB 199.00$5.95 |
| Tonga | $1.99 | $3.99 | $5.99 |
| Trinidad and Tobago | $1.99 | $3.99 | $5.99 |
| Tunisia | $1.99 | $3.99 | $5.99 |
| Turkey | TRY 59.99$1.23 | TRY 129.99$2.66 | TRY 299.99$6.13 |
| Turkmenistan | $1.99 | $3.99 | $5.99 |
| Turks and Caicos | $1.99 | $3.99 | $5.99 |
| Uganda | $1.99 | $4.99 | $6.99 |
| Ukraine | $1.99 | $4.99 | $6.99 |
| United Arab Emirates | AED 7.99$2.18 | AED 14.99$4.08 | AED 22.99$6.26 |
| United Kingdom | £1.99$2.63 | £3.99$5.28 | £5.99$7.92 |
| United States | $1.99 | $3.99 | $5.99 |
| Uruguay | $1.99 | $3.99 | $5.99 |
| Uzbekistan | $1.99 | $3.99 | $6.99 |
| Vanuatu | $1.99 | $3.99 | $5.99 |
| Venezuela | $1.99 | $3.99 | $5.99 |
| Vietnam | ₫49,000$1.89 | ₫99,000$3.82 | ₫199,000$7.67 |
| Yemen | $1.99 | $3.99 | $5.99 |
| Zambia | $1.99 | $3.99 | $6.99 |
| Zimbabwe | $1.99 | $4.99 | $6.99 |
Scientific Calculator Plus 991 FAQ
- Is Scientific Calculator Plus 991 free?
- Yes. The app and its basic features are free, in all 175 countries it sells in. Premium features are paid: they start from $1.99 (US), across 2 subscriptions and 2 one-time purchases.
- How much does Scientific Calculator Plus 991 cost per month?
- Calculator month subscription is $1.99 (US). The annual plan works out cheaper per month: $3.99 a year.
- Does Scientific Calculator Plus 991 have a free trial?
- No. None of its offers (US) come with a free trial.
- Where is Scientific Calculator Plus 991 cheapest?
- A monthly subscription costs NGN 1,500.00 (≈$1.13) in Nigeria and HUF 999 (≈$3.11) in Hungary, its cheapest and dearest countries.
- What are the best alternatives to Scientific Calculator Plus 991?
- Dicamon - Giải Toán Lý Hóa Anh (4.6 from 88,610 reviews, premium from $0.99), Symbolab - AI Math Solver App (4.6 from 64,642 reviews, premium from $2.49) and Graphing Calculator X84 (4.5 from 53,750 reviews, premium from $5.99).
Scientific Calculator Plus 991 download
Last updated 3 months ago.
Scientific Calculator Plus 991 sells in 175 countries. It was released 7 years and 6 months ago, on 3 Apr 2019. It holds a 4.7 rating from 207,083 reviews.
Supports 50 languages: English, Albanian, Arabic, Armenian, Azerbaijani, Basque, Belarusian, Bangla, Bosnian, Bulgarian, Catalan, Croatian, Czech, Danish, Dutch, Finnish, French, German, Greek, Hebrew, Hindi, Hungarian, Indonesian, Italian, Japanese, Kannada, Korean, Lao, Latvian, Lithuanian, Macedonian, Malay, Malayalam, Odia, Persian, Polish, Portuguese, Punjabi, Romanian, Russian, Serbian, Chinese, Slovak, Spanish, Swahili, Swedish, Thai, Turkish, Ukrainian, Vietnamese.
How much does Scientific Calculator Plus 991 make?
Third-party estimates for the last 30 days, worldwide — not the store's own figures, which Apple publishes for nobody.
Revenue by plan
- One-time 61%
- Monthly 28%
- Annual 11%
Revenue by country
- United States 15%
- Vietnam 14%
- Germany 9%
- Saudi Arabia 8%