Comparison

Arbitrium vs Decisly

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

Head to head
About

Arbitrium

This app assists in making rational decisions by allowing you to define criteria and rate your options. It uses a weighted decision matrix to help you identify the best choice for various life scenarios.

Highlights
  • Define decision criteria
  • Rate available options
  • Weighted decision matrix
  • Identify best choice
  • Save and manage decisions
Features
Read full description

We often have to take decisions. Arbitrium is an app that will help you take the right one in a simple and rational way. Establish the criteria you need to consider and then rate each option you have available. The option with the highest score will be the best one. Arbitrium is based on the weighted decision matrix concept and will help you take decisions such as: Which car should I buy? Which bank should I choose for a mortgage? Where should I go on vacation? Which job offer should I accept? Which nursery should I choose for my child?

About

Decisly

This app helps you make difficult life decisions by weighing pros and cons with an importance scoring system. Explore multiple options or a random choice with premium features.

Highlights
  • Decision making with pros and cons
  • Importance scoring algorithm
  • Multiple options evaluation
  • Random choice generator
  • Premium features available
Features
Read full description

How often do you usually have to make a big decision, which can affect your life in drastic ways, and you can't decide what to do? Decisly is here to help you! Just add a decision, attach pros and cons and you immediately get a suggestion, what to do. The suggestion is based on a simple scoring algorithm: - each pro and con has an importance appended to it - while pros get can get an importance from 0 to 10, the importance scale for cons is from -10 to 0 - at the end, the arguments are evaluated by simply adding up the importance This is how to make a Pros and Cons decision, but there are more decision types to discover with Decisly Premium: ** Multiple options ** - add multiple options to your decision - attach pros and cons to the options - evaluate which one you should pick, by comparing the arguments ** Random ** - add multiple options to your decision - randomly pick one Please feel free to contact me at anika@decisly.app in case you have any questions or requests. I appreciate any kind of feedback. ---- ** Icons made by ** settings - https://icons8.de/icons/set/settings from https://icons8.de icloud - https://icons8.de/icons/set/cloud from https://icons8.de multiple options - https://icons8.de/icons/set/single-choice from https://icons8.de random - https://icons8.de/icons/set/dice from https://icons8.de result view - https://www.freepik.com/free-photos-vectors/background from www.freepik.com

Screenshots

Arbitrium4 screens
Decisly4 screens

Verdict

The call

The clearest difference is rating: Arbitrium at 4.9 against Decisly's 4.4. Arbitrium also leads on review sentiment (100% vs 67%). Decisly's advantage is update cadence (fortnightly vs every 28 months) and iOS requirement (11.0 vs 15.6). On price, ratings volume, 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

Both are free to download. Arbitrium sells 1 one-off in-app purchase and Decisly sells 7 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Arbitrium holds the better App Store score, 4.9 against 4.4. Both are backed by a comparable volume of ratings — 11 and 7 respectively. Written reviews point the same way: 100% of Arbitrium's written reviews are positive against 67% of Decisly's.

UpkeepUpdate frequency

Arbitrium ships an update every 28 months, Decisly fortnightly. The most recent releases landed on October 13, 2026 and October 4, 2026 respectively.

Scorecard4 real differences · 6 level
Arbitrium versus Decisly: the parameters behind the verdict, then further details
ParameterArbitriumDecisly
PriceFreeFree
Rating4.9 (11 ratings) — better4.4 (7 ratings)
Positive reviews100.0% of reviews — better66.7% of reviews
Number of ratings11 — better7
Update frequencyEvery 28 monthsFortnightly — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFreemium
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.611.0 — better
Further details — not scored
Size8 MB20 MB
Age rating4+4+
DeveloperThe Lost ProjectAnika Seibezeder

Customer experience

Arbitrium

All ratings11 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews10 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Decisly

All ratings7 ratings
Positive71.4%
Neutral28.6%
Negative0.0%
Written reviews3 reviews
Positive66.7%
Neutral0.0%
Negative33.3%

In-app purchases

1 purchases

Arbitrium

One-time1
  • PRO Mode$0.99
7 purchases

Decisly

One-time7
  • Random decisions$0.99
  • Send me a small tip$0.99
  • Decisly Premium once$0.99
Show 4 more
  • This or That decisions$1.99
  • Decisly Premium once$1.99
  • Decisly Premium once$2.99
  • Send me a generous tip$3.99

Questions

Is Arbitrium free?
Arbitrium is free to download, with in-app purchases available.
Is Decisly free?
Decisly is free to download, with in-app purchases available.
Which has better reviews, Arbitrium or Decisly?
Arbitrium is rated higher. Arbitrium averages 4.9 out of 5 from 11 ratings, while Decisly averages 4.4 from 7 ratings.
Do Arbitrium or Decisly have ads?
Neither Arbitrium nor Decisly shows ads.
Which is updated more often, Arbitrium or Decisly?
Arbitrium ships an update every 28 months, and Decisly fortnightly. Most recently, Arbitrium was updated on October 13, 2026 and Decisly on October 4, 2026.

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