Comparison

Primes + vs btw

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

Head to head
About

Primes +

Features
Read full description

In mathematics the prime numbers (also called “primes”) are natural numbers greater than 1, divisible only by 1 and by themselves. "Primes" is a mathematical game of search of natural numbers that added together give as result prime numbers. For each level of the game, will be shown: - a TABLE of prime numbers formed by 30 prime numbers (that will change at every level of the game) - a MAP formed by 16 boxes containing natural numbers which, added together, will give as result at least 5 primes among those listed in the TABLE of prime numbers In the TABLE, primes will be highlighted: - in red if it exists in the MAP at least one combination (sum) of natural numbers that give as result the prime number highlighted in red (there is certainly a combination in the MAP) - in blue if it is not certain that there is in the MAP a combination (sum) of natural numbers that give as result the prime number highlighted in blue (may or may not exist a combination in the MAP) An automatic calculator (indicated by SUM) will assist You in the sum of natural numbers that You have selected in the MAP (combination). For each level, You will have 3 minutes of time to find 5 primes among those listed in the TABLE of prime numbers: so, you'll have to find 5 combinations of natural numbers in the MAP that will give as result 5 distinct prime numbers. This game increases the visual memory and the speed for mathematical calculation. It will also help You to store a large amount of prime numbers. Have fun with Primes...

About

btw

Navigate a minimalist maze by collecting circles. You must strategically switch light colors to reveal paths and collect all objectives before exiting the level. Offers a relaxing yet challenging puzzle experience with numerous unique stages.

Highlights
  • Collect all circles
  • Switch light colors
  • Exit the field
  • 88 unique levels
  • Simple and user-friendly design
  • Relaxing sound and music
Features
Read full description

Engaing, innovative, minimal puzzle game with dozens of levels. The aim is simple: you need to move through the field and pickup all the circles. The problem is they are visible only on one of two colors – that's why you should use toggles to switch the light. *** How to play *** The design is simple and there are different levels. A color line will enter in the field made of squares. The user needs to drag the line to collect the circles appear in that field. After collecting all the circles you need to exit from the field. After that, you will be on next level. You can also shift the line backward side. Gather all the circles and pass on next level. *** Features *** • 88 unique levels • Easy to play to refresh mind • No target based labyrinth game • Simple & user-friendly design • You can mute sound & music in the setting option • Labyrinth game with lots of different levels • Relaxing sound and music Play btw and become great witness in the route game.

Screenshots

Primes +1 screens
btw4 screens

Verdict

The call

The clearest difference is update cadence: btw at every 3 months against Primes +'s every 38 months. btw also leads on device support (3 vs 1) and iOS requirement (10.0 vs 18.0). Primes +'s advantage is price ($0.99 vs $1.99). On ads and in-app purchases 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

Primes + costs $0.99 and btw $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Primes + ships an update every 38 months, btw every 3 months. The most recent releases landed on October 9, 2026 and October 24, 2026 respectively.

Scorecard4 real differences · 6 level
Primes + versus btw: the parameters behind the verdict, then further details
ParameterPrimes +btw
Price$0.99 — better$1.99
Rating—4.6 (900 ratings) — better
Positive reviews—85.7% of reviews
Number of ratings—900 — better
Update frequencyEvery 38 monthsEvery 3 months — better
AdsNoNo
In-app purchasesNoNo
Monetization—Free
DevicesiPhoneiPhone, iPad, iPod — better
Requires iOS18.010.0 — better
Further details — not scored
Size11 MB15 MB
Age rating4+4+
DeveloperGianluca NataliniOleksandr Kozlov

Bugs and requests

Primes +

Not enough reviews yet to summarise bugs or requests.

btw

Reported bugs

2 issues
  • Incompatibility with certain devices
  • Inability to complete certain levels

Requested features

3 requests
  • Hint system or level solutions
  • Landscape mode support
  • Progress sync across devices

In-app purchases

None

Primes +

No in-app purchases

None

btw

No in-app purchases

Questions

Is Primes + free?
Primes + costs $0.99, with no in-app purchases.
Is btw free?
btw costs $1.99, with no in-app purchases.
Do Primes + or btw have ads?
Neither Primes + nor btw shows ads.
Which is updated more often, Primes + or btw?
Primes + ships an update every 38 months, and btw every 3 months. Most recently, Primes + was updated on October 9, 2026 and btw on October 24, 2026.

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