CalcKit vs Next Reservation
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
CalcKit
Design and build your own custom calculators with personalized formulas and input labels. Organize them into groups for easy access. Ideal for students, scientists, and engineers needing more than standard calculator functions.
- Design calculators with custom formulas
- Up to seven user-defined variables
- Built-in trig and math functions
- Organize calculators into groups
- Unlimited personal calculator creation
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CalcKit lets you create your own personalized calculators. With CalcKit you can: - Design calculators using your own formulas and input labels - Enter formulas with up to seven user-defined variables - Make use of built-in trig and other math functions - Organize your calculators into convenient groups CalcKit has a simple, intuitive interface, and it comes with a set of example calculators to get you started. You can create an unlimited number of personal calculators. Each formula can be as simple or as complex as you need. CalcKit is ideal for students, scientists, engineers and others who do everyday calculations and need more than a limited set of canned formulas.
Next Reservation
Easily schedule recurring appointments and add them to your device's calendar. Set preferred intervals for services like haircuts or dental visits and quickly register them with optional location-based reminders.
- Schedule recurring appointments
- Add appointments to calendar
- Set preferred scheduling intervals
- One-tap registration
- Location-based reminders
- Pre-set appointment templates
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β 1. What Does This App Do? This app is designed to help you schedule your "next appointment" and add it to your calendar. At first glance, you might wonder, βDo I really need an app for that?β However, if youβve ever found yourself in situations like the following, it might be worth giving it a try: - At the dentist, trying to schedule your next appointment three months out, but fumbling to flip through the calendar. - Booking a time you thought was free, only to later realize it conflicts with another event. β 2. How Does It Work? Once you set up your preferred scheduling intervals in advance, the app allows you to: - Display the date/time for the next appointment (based on your set interval). - Make small adjustments if needed, then register the appointment to your calendar. Thatβs all there is to it! β 3. Additional Benefits Even with such a simple feature set, adding one more setting can make your calendar even more convenient. For example, if you include a location in your appointment template, youβll get a notification like, βItβs time to leave,β around the time you should head out. This is actually a built-in feature of the iOS Calendar app, but manually adding locations every time can be a hassle or easy to forget. By pre-setting this in the app, you can enjoy the convenience with just one tap. β 4. Usage Examples - Haircuts: Every 7 weeks - Dentist Appointments: Every 3 months To be honest, I currently only use the app for these two scenarios, which means I use it about once a month on average. :)
Screenshots
Verdict
The clearest difference is in-app purchases: CalcKit at none against Next Reservation's 1. CalcKit also leads on iOS requirement (15.6 vs 17.6). Next Reservation's advantage is update cadence (every 6 days vs every 30 months) and review sentiment (100% vs 80%). On price, ads and device support there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. Next Reservation sells 1 one-off in-app purchase. CalcKit asks for nothing beyond the download.
CalcKit ships an update every 30 months, Next Reservation every 6 days. The most recent releases landed on September 24, 2026 and October 2, 2026 respectively.
| Parameter | CalcKit | Next Reservation |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 80.0% of reviews | 100.0% of reviews β better |
| Update frequency | Every 30 months | Every 6 days β better |
| Ads | No | No |
| In-app purchases | No β better | Yes |
| Monetization | Free β better | Free with in-app purchases |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 15.6 β better | 17.6 |
| Further details β not scored | ||
| Size | 0 MB | 5 MB |
| Age rating | 4+ | 4+ |
| Developer | Akkyra Systems | takaaki024 |
Customer experience
CalcKit
Next Reservation
In-app purchases
CalcKit
No in-app purchases
Next Reservation
- Remove Ads$1.99
Questions
Is CalcKit free?
Is Next Reservation free?
Do CalcKit or Next Reservation have ads?
Which is updated more often, CalcKit or Next Reservation?
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