Something

    if (months) {
        [age appendFormat:@"%ld month%@, ",months, (months > 1 ? @"s" : @"") ];
    }
    if (days) {
        [age appendFormat:@"%@%ld day%@",(months ? @", " : @""), days, (days > 1 ? @"s" : @"")];
    }
    if (hours) {
        [age appendFormat:@"%@%ld hour%@",(days ? @", " : (months >= 1 ? @", " : @"")),hours, (hours > 1 ? @"s" : @"")];
    }
    if (minutes) {
        [age appendFormat:@"%@%ld minute%@",(hours ? @", " : (days >= 1 ? @", " : @"")),minutes, (minutes > 1 ? @"s" : @"")];
    }
    if ([age length] <= 1) {
        [age appendString:@"Just now"];
    }
    else {
        [age appendString:@" ago"];
    }