Most players treat the Injustice: Gods Among Us Mobile shop as a place to dump currency when they have accumulated enough. That is the wrong way to think about it. The shop is a list of options, most of them bad, and the skill is knowing which ones to spend on, which to wait for, and which to ignore forever.
This guide covers the actual shop structure, the purchases that earn their cost, and the timing mistakes that turn a good credit balance into a bad one.
What the shop actually sells
The mobile shop is split into sections that use different currencies. Knowing which section does what is the first step, because mixing them up is how people buy the wrong thing.
Main store — Power Credits
This is where most spending happens, and it is also where most waste happens.
Characters. Bronze characters cost 8,000 to 15,000 credits. Silver characters cost 25,000 to 50,000. Gold characters run from 130,000 to 375,000. The price is not the problem — the problem is buying a Bronze or Silver character because it is cheap, when it will be obsolete within days. Only buy lower-rarity characters when a Challenge Mode team specifically requires them.
Support cards. These are the best value in the entire store. Support cards provide passive bonuses to your entire team — damage increases, health boosts, power generation — and they stay with every character you field. The Spectre, for example, gives a flat damage bonus to everyone. The cost is small. The payoff is permanent.
Gear Locker. Three random gear pieces for 65,000 credits. The gear is rarely legendary, often duplicates what you already own, and the randomness means you have no control over what you receive. Skip this unless you are desperate for specific gear slots to unlock.
Nth Metal store
The premium section. Nth Metal is the currency you earn slowly and spend carefully.
Nth Metal character packs. These guarantee at least one Gold character and may include Nth Metal-exclusive characters with unique Dark Power mechanics. The value is better when you save for a full pack rather than making smaller partial pulls.
Challenge Booster Packs. Available only during Challenge Mode events. These offer characters that are otherwise unavailable, including event exclusives. If you are actively participating in a challenge, these packs are worth considering. If you are not running the challenge, they are just expensive random pulls.
Alliance store
Alliance Coins are earned through alliance activities, and the store reflects that pace.
Support cards and duplicates. The alliance store is where you promote support cards to higher star ratings after you have collected the initial copies from the main store. It is also where some exclusive support cards appear. This is the only section where Alliance Coins are not a trap.
Materials. Various upgrade materials appear here occasionally. Only buy them if you have a specific character or gear piece in mind. Alliance Coins accumulate slowly, and spending them on generic materials you might use someday is the same mistake as spending Power Credits on characters you might build someday.
Event and rotating stores
Limited-time stores appear during events and offer specific characters, gear, or currency packs for a restricted window.
The rule for rotating stores: buy only what you need for an active event, and only if the event rewards are better than what the same currency would earn elsewhere. Event stores often look generous and are frequently not, because the prices are set in the event's premium currency rather than the standard ones.
What is actually worth buying
Ranked by how reliably the purchase pays off.
1. Support cards
Support cards are the best value in the shop by a large margin. They benefit every character on your roster, they cost a fraction of what a single character costs, and they are permanent. Buy every support card you can before spending on anything else.
2. Gear slots
The first gear slot is free at level five. The second costs 20,000 Power Credits. The third costs 40,000. These are one-time purchases per character, and they unlock the gear system for that character. A levelled character without gear slots is leaving performance on the table.
3. Specific Gold characters
Buying a specific Gold character from the store is reliable and expensive, which makes it a good purchase when you know exactly which slot on your team the character fills. It is a bad purchase when you are buying because the character looks strong in isolation.
4. Nth Metal packs during events
Nth Metal packs are better during events because event packs often include bonus characters or enhanced drop rates. Save your Nth Metal for an event rather than pulling on the standard rotation.
5. Alliance Coins for support card dupes
Once you have collected the core support cards, Alliance Coins become useful for promoting them. Promotion increases the bonus percentage, which means every character on your roster gets a stronger passive. That compounding effect makes dupes worth the slow accumulation.
What to skip
Bronze and Silver characters from the main store
They become obsolete quickly. The only exception is when a Challenge Mode team requires a specific Bronze or Silver character — and even then, you only need one copy, not a maxed version.
Booster packs in the main store
Bronze, Silver, and Gold booster packs have drop rates that do not justify the cost. The randomness means you can spend 150,000 credits on a Gold pack and receive characters worth far less than a direct purchase would have cost. Save for specific targets instead.
Gear Locker pulls
Sixty-five thousand credits for three random pieces, most of which will be common or rare duplicates. Gear drops constantly from Online Battle and Survivor Mode. The Locker is where credits go to be wasted.
Anything you cannot name a use for
This is the same principle that runs through every other part of the game. A purchase you cannot explain is entertainment, not progression. Entertainment is fine, but it should be a deliberate choice, not an accident.
When to spend and when to wait
Power Credits
Power Credits are the soft currency, and they are consumed by almost everything: levelling characters, levelling and fusing gear, unlocking gear slots, buying specific characters. The constraint is almost always "not enough, not yet."
The spending rhythm that works: accumulate to a specific target — a character you need, a gear slot for your main team, a support card you are missing — and spend when you reach it. Do not spend on anything that does not advance a target you have named.
Nth Metal
Nth Metal is the premium currency, and the mistake is spending it as soon as it arrives. Small spends on single-character packs feel satisfying and usually deliver less value than saving for a full pack. The full pack is the better purchase, and the discipline to wait for it is what separates players who consistently pull strong characters from players who have a collection of mid-tier pulls.
Alliance Coins
Alliance Coins are the conditional currency. They only matter as fast as your alliance earns and spends them. For most players that is slower than expected, which makes Alliance Coins the last currency to budget for. Ignore them until your alliance is genuinely active and the store has something you actually need.
The sale timing trick
Store sales are the best time to make large Power Credit purchases. During a sale, buying a Gold character includes bonus characters that can be sold for roughly thirty percent of their value. The net effect is a discount on the main purchase.
The strategy:
- Save credits before the sale starts. Do not spend on the assumption that a sale is coming — wait until it actually appears.
- Buy the largest character you can afford during the sale window.
- Sell the bonus characters immediately.
- Repeat for the duration of the sale.
During aggressive sales, the effective discount can reach ten to fifteen percent. That is not a dramatic difference, but it is free, and it compounds across multiple purchases.
Where the shop fits in your economy
The shop is not a separate system. It is one endpoint of the same resource problem that runs through every other guide on this site.
Power Credits come from Standard Battle, events, and daily rewards. Nth Metal comes from Survivor Mode, Online Battle seasons, and Phantom Zone. Alliance Coins come from your alliance. The shop is where those resources convert into roster progress, and the conversion rate depends entirely on what you choose to buy.
The most expensive mistake in this game is buying the wrong resource. It does not matter whether the purchase was cheap — if it did not address your actual bottleneck, it was wasted. The are Injustice mods worth it? guide covers the diagnosis side of this in detail, and the Power Credits guide and Nth Metal guide cover the specific currencies.
The short version
- Support cards first. They are the best value in the store and they benefit every character.
- Gear slots second. Unlocking them is a one-time cost with permanent value.
- Specific Gold characters during sales. Buy what you need, not what looks good.
- Skip booster packs, the Gear Locker, and anything you cannot name a use for.
- Save Nth Metal for full packs, not small pulls.
- Alliance Coins come last, and only when your alliance is actually active.
- Run the diagnosis before you spend. The wrong resource at a discount is still wasted.
Where to go next
- Injustice Power Credits — what your main early bottleneck actually is
- Injustice Nth Metal — when to spend premium currency and when to wait
- Injustice gear shards — why finishing one gear piece beats starting three
- Best Injustice characters — how to judge which character is worth buying
- Injustice challenge mode — where roster breadth becomes the bottleneck