Arbitrium vs Decisly
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- Define decision criteria
- Rate available options
- Weighted decision matrix
- Identify best choice
- Save and manage decisions
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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?
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.
- Decision making with pros and cons
- Importance scoring algorithm
- Multiple options evaluation
- Random choice generator
- Premium features available
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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
Verdict
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
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.
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.
Arbitrium ships an update every 28 months, Decisly fortnightly. The most recent releases landed on October 13, 2026 and October 4, 2026 respectively.
| Parameter | Arbitrium | Decisly |
|---|---|---|
| Price | Free | Free |
| Rating | 4.9 (11 ratings) — better | 4.4 (7 ratings) |
| Positive reviews | 100.0% of reviews — better | 66.7% of reviews |
| Number of ratings | 11 — better | 7 |
| Update frequency | Every 28 months | Fortnightly — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Freemium |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.6 | 11.0 — better |
| Further details — not scored | ||
| Size | 8 MB | 20 MB |
| Age rating | 4+ | 4+ |
| Developer | The Lost Project | Anika Seibezeder |
Customer experience
Arbitrium
Decisly
In-app purchases
Arbitrium
- PRO Mode$0.99
Decisly
- Random decisions$0.99
- Send me a small tip$0.99
- Decisly Premium once$0.99
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- This or That decisions$1.99
- Decisly Premium once$1.99
- Decisly Premium once$2.99
- Send me a generous tip$3.99







